Theme: update to sync with gtk Adwaita

- consistent OSD colors
- consistent fg/bg colors
- updated rounded corners
- switches

Fixes #841

Squashed commit of the following:

commit d080159ea67641653814f65d5d7dbd7fe0aacdbe
Author: frederik.feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Sat Jun 15 18:32:18 2019 +0200

    Icon tile changes

    - use the medium radius
    - make checked tiles less hardcore black
    - adjust folder popup bg color to checked tiles

commit c36ca133e14bbc3bd69826adab13699000132621
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Thu Jun 6 17:28:04 2019 +0200

    Don't raise hover btn

commit dbede26162ced9ac4a5755ac65371e5ca2a3206f
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Thu Jun 6 17:26:39 2019 +0200

    Light/Dark GDM entry, add shadows to btns

commit 4a51a4923cf550947a3584f1d6eed2a5ee14cde1
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Thu Jun 6 16:21:00 2019 +0200

    Darker GDM, better popover hover, and...

    brighter hover color for the dark theme
     brightersearchresult description

commit c0bbc587dfda99656073578479ed697116614e2a
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Thu Jun 6 13:25:26 2019 +0200

    GDM and overview toggle btn changes

    - try to simplify the look of the gdm buttons
    - let the GDM entry look like the search entry
    - use a gray/white/blue stripe for the overview toggle btns

commit adc8baae49a78b2b696d9e7613358012c394a4e1
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 16:42:56 2019 +0200

    theme: darken vignette

    - instead of locally boxing in search results, darken the whole overview

    Addresses #288

commit 9ebb6b977c90c5697f7662371903b081bde2b958
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 15:45:47 2019 +0200

    theme: experimental search entry

    - bring back the golder 3.0 days

commit 88be1f7627dfbd96323d1c79e6040b9e8ee5044d
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 15:40:26 2019 +0200

    theme: style search and results

     - Improve legibility by using the OSD style for the results
     - Would be nice to include the search entry in the container
       and have a nice transition.

    Addresses #288

commit b482cf5798d1267aec1c943019fa542b981fc6d1
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 09:58:19 2019 +0200

    theme: theme slider handle

    matching gtk

commit 1688f5021d74c9f2d3413c538eb1362d2a9acbf9
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 09:44:31 2019 +0200

    theme: sync calendar menus with the rest

     use :active and :hover colors like the rest

commit 258e59e3cfad0eddf32d1d91d625bb893ebb7fd6
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Fri May 31 09:38:31 2019 +0200

    theme: revert :hover and :active colors to gtk

commit 7471c31efd549d27a510fd64187290bb658da38e
Author: frederik.feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Thu May 30 20:30:09 2019 +0200

    OSD bg and general border changes

    - darker, less transparent OSD
    - brighter OSD border
    - no border for over view panels and entry
    - fix border color of popups
    - remove trough variable as osd trough and popup trough cant have the same color if dependant on fg_color, fixed hex could also work
    - thinner workspace border

commit fc85bab91835c8ce80c85a8467c594546188d1de
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 13:51:50 2019 +0200

    theme: adwaita:dark bg is lighter

commit d35cf2673dd0ccd9ce395ac11c1e14c3c6907a14
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 13:12:20 2019 +0200

    theme: osd panels for overview

    - light borders for Frederik

commit 6ba57af68c7ef88f18d7c05c2a61a1aec50423ac
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 12:54:52 2019 +0200

    theme: regular buttons to match gtk

commit 86a4bd618f6d434811c74dc0e58f8399b8d45d13
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 12:34:49 2019 +0200

    theme: rearrange header a bit

    - makes sense to have (c) on top

commit 6f0d688aca39fb88a757cf10bd926b04e01bbeed
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 12:31:53 2019 +0200

    theme: regular buttons :active state to match gtk

commit 44640eea31b3fd6f72641b46253132fd6fe02ab8
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 11:49:22 2019 +0200

    theme: get rid of the bubble prefix

    - originally related to tweaking the osd style for use in dialogs,
      it no longer serves the purpose as dialogs are eithe rlight or dark
      and thus can use the colors directly.

commit 31a74c34c56ae86d81bad3c9f2f0945a96b55a72
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 11:29:36 2019 +0200

    theme: simplify button drawing

    - the original style was built on OSD colors and the conditionals no longer made any sense. In Adwaita:gtk the color conditionals special case the color buttons (warning and suggested tinting). This does not exist in the shell

commit b55a73ce78b56da362bfa2d9614655b96ac5167b
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 10:23:10 2019 +0200

    theme: match gtk sliders

    - FIXME: currently unable to stle the slider itself
      color sets the background color but no way to style the border as
      far as I can tell gazing at js/ui/slider.js

commit e50921049272f68e2ef1625f07b956c8661a14ad
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 09:38:00 2019 +0200

    theme: add light/dark switches

commit 5502526c46350ccd5620d7f37440f712bce1bd70
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 09:26:12 2019 +0200

    theme: overview is OSD styled

    FIXME: .show-apps-icon isn't colored for some reason

commit f026dd8fbb3310ded7d0aab5496b9c286606968d
Author: Jakub Steiner <jimmac@gmail.com>
Date:   Thu May 30 09:03:09 2019 +0200

    theme: keep variant around for HC

commit 9693dea282c3d1c55b4bdd7641908a963a9acfc8
Author: frederik.feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Wed May 29 22:54:50 2019 +0200

    Further improvements

    - back to gtk styled popups
    - smaller drop shadow for notifications
    - no shadow for OSD
    - fix high color
    - move bubble colors back to common for now

commit 8152dc4dce4abfa599c0a674543c3afaa755fdb7
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Wed May 29 17:14:37 2019 +0200

    Use $variant for bubble colors, fix high-contrast

commit b796c5a5631b3ce8976ab91759d83decff782eaf
Author: Feichtmeier <frederik.feichtmeier@gmail.com>
Date:   Wed May 29 14:47:42 2019 +0200

    Shell theme renew

    - light colored, bubble-like popovers, dialogues and notifications
    - unified OSD colors for OSD elements
    - small shadow for OSD elements to improve visibility above dark backgrounds
    - small screenshield shadow improvements
    - slightly bigger GDM buttons
    - rounder buttons, rounder entries
    - flatter entries
4 jobs for !584 with wip/jimmac/sync-with-adwaita in 5 minutes and 26 seconds (queued for 3 seconds)
detached
Status Job ID Name Coverage
  Review
passed #330596
check_commit_log

00:00:21

 
  Build
passed #330597
build

00:03:55

 
  Test
passed #330598
test

00:00:59

passed #330599
test-pot

00:01:09