Correction to day abbreviation in some languages

In some languages all the days begins with the same letter, to get the abbreviation is recommended use locale system directly and not another rare method.

We have the %a time format for this.
Fix theme selector for applet icon hover state
make string literal 'Disabled' in cs_tiling translatable
Merge pull request #3429 from collinss/applet-hover-theme

Fix theme selector for applet icon hover state
Merge pull request #3430 from xubincs/master

make string literal 'Disabled' in cs_tiling translatable
Merge pull request #3426 from paucapo/patch-1

Correction to day abbreviation in some languages
looking-glass: fix launching on-demand
Cinnamon settings: remove non-functional titlebar "shade" action
settings: Add toggle-stick and toggle-above to windows titlebar actions,
expose keybinding for toggle-above.