We intend to make all GTK apps depend on the desktop schemas. Since
the schemas depend on gnome-backgrounds to determine the default
wallpaper path, it would increase the closure size significantly
for smaller apps.
We could split out the org.gnome.desktop.background and screensaver
schemas but that would make the packaging unnecessarily complicated.
Instead we remove the backgrounds dependency since they are not used
(outside of GNOME) or they will be replaced by a different set by
the NixOS module. There will be no background when running GNOME
manually but that can be easily fixed.
changelog:
```
- use Breeze window theme on KDE Plasma 5 (thanks to Alexander Wilms)
- support single-finger panning gesture on most config dialog components
- support single-finger panning touch gesture on log viewer
- pdf viewer scroll tool: support single-finger panning gesture
- center width-constrained documents in the editor (optional)
- add document tab context menu entries "Close" and "Close All Other Documents"
- improved layout of config build page
- add system check for language tool
- change search defaults to case-insensitive (feature-requests#1254)
- tags for beamer
- change preview default to embedded pdf
- handle preview failures more gracefully, i.e. no warning pop-ups
- repect preview settings (panel,etc) also for hover preview
- show hover preview as tooltip in case of inline-mode
- warn if compiler commands are actually a command list
- several improvements to the latex parser
- notify that a restart is required when switching between modern and classic style
- improved LanguageTool communication: better error handling
- add reset to default button for some LT settings
- add 200ms delay before showing auto-hidden viewer toolbar to prevent flicker
- eye candy for pdf circular magnifier (adapted code from texworks)
- show pdf highlight in magnifier
- capslock does not close completer any more
- alternative approach for determine directories from complete texts
- use cache for previews
- auto open completer when starting to type in references, packages etc.
- scripting: editor.cutBuffer
- subframetitle in structure view
- enable inputMethod (e.g. ^) in completer
- change default for complete non-text chacters to off, as it tends to cause unexpected behaviour
- fix word separation with punctuation
- fix: remove incorrect warning "Unknown magic comment" for "% !TeX TS-program = "
- fix: avoid compile fail if magic comment program is spelled wrongly
- fix: duplicate lines in autogenerated cwl files
- fix multi line argument interpretation
- fix pdfviewer in enlarged mode
- fix editing of basic shortcuts
- fix number in length keyVals
- fix flickering in structure view
- fix crash with qimage cache
- fix crash when restoring centralVSplitterState (bug 2175)
- fix highlighting of current entry in structure
- fix Open Terminal not working on windows QTBUG-57687 (bug 2178)
- fix column detection for tabu/longtabu
```
