Move a bit closer to designs
Moves us a bit closer to https://gitlab.gnome.org/Teams/Design/app-mockups/-/tree/master/videos?ref_type=heads
Still lots of work to but might be a good point in time for an MR
* css: Only make main window transparent
* window: Remove info bar
Use the headerbar instead. This moves us closer to the designs.
* window: Use adw-toolbar for bottom bar
* window: Drop margin around controls
Getting us closer to the designs
* Add shortcuts window
* Add about dialog
* window: Add menu button
Helps: #1 (closed)
Edited by Guido Günther