[pkg-cinnamon] Bug#852973: Very annoying user interface for the default Adwaita windowing theme

[Margarita Manterola]

Package: cinnamon-common
Version: 3.2.7-1
Severity: important
Control: clone -1 -2
Control: reassign -2 cinnamon-desktop-data 3.2.4-3

The Adwaita theme has stopped being a proper "metacity" theme.  This 
means that in the cinnamon theme chooser, if no theme is installed, when 
the user clicks to change the theme, they get an empty list, which is 
quite confusing UX.

Further on, if there are other themes installed, the user is able to 
switch to one of those themes but then they can't switch back to the 
default Adwaita theme (it disappears from the list). This is even worse 
UX, the user can't switch back to the default theme unless they start 
tinkering with things like dconf-editor.

Muffin internally calls the default theme "Default", it's the old 
Adwaita theme, which is shipped in /usr/share/muffin/theme/.  The 
easiest solution to this issue is to rename all usage of "Adwaita" -in 
what relates to the window manager- to "Default".

This implies 3 changes:
1) Change the name of the shipped thumbnail from Adwaita.png to 
Default.png
2) Change cs_themes.py to always include a "Default" entry.
3) Change the schema so that the default theme is called Default.

Changes 1 and 2 need to be done in cinnamon-common, change 3 needs to be 
done in cinnamon-desktop-data.

-- 
Regards,
Marga