Update POTFILES.in

See merge request !226

app.css: Apply devel headerbar colors more selectively

See merge request !224

Remove gspell

Closes #333

See merge request !225

Gspell hasn't been used since we switched to a source view for the
message entry. We should not keep it in the tree if its not used
and nobody is currenty working on wiring it up again.

Close #333

Prevents label color leaking onto buttons.

cargo.sh: use single brackets for shell compatibility

See merge request !222

/bin/sh on FreeBSD does not support [[

Message widget refactor and adds uitype for messages

See merge request !220

Add appripriate actions for images in the context menu

See merge request !221

This connects the buttons "Open With...", "Save Image As..." and "Copy
Image" with their appropriate actions.

See #76

See #76

See #76

this fixes emotes showing only the MXID instate of the username

connect the click callback to the image where the message widget is
created

This adds a new file called uitypes which contains a new struct which
holds all information needed to display a message in the message
history.
Also AppOp is removed from the message widget and the widget was
refactored to use the new uitype

Headerbar cleanups

See merge request !218

main_window.ui: Refine 'Log in' label

See merge request !217

Use 'title' property instead of a manually added label.

Use 'title' property for title, and pack buttons into the headerbar itself.

Use 'title' property instead of adding the label manually.

Set font weight to ultralight, also replace hardcoded grey color with
default 'dim-label' style class.

use serde_derive for Member deserialization

See merge request !216

media_viewer: move the media viewer to a custom widget

See merge request !214

this makes appOp a little smaller and gives the possibility to create
the media_viewer without appOp

small refactorings

See merge request !209

handle in_reply_to

See merge request !213

make user search case insensitive

Closes #298

See merge request !212

Make MXID in private rooms selectable

See merge request !211