+ New theme: gtk-greeter-160
+ Message dialog buttons now stylable
* Fixed: language/session selection now works with menus
* If no session selected (no default and no sessions_widget) then using first in the list
* Fixed: keys names - user-image, list-image
Merge branch 'private/theme-160' into develop
+ New option: appearance/hide-prompt-text
* Theme "classic" renamed to "gtk-greeter-150"
+ For image menu items without text "set_widget_text" sets tooltip
* Updating translations: ru, be, es

Signed-off-by: Pablo Lezaeta <prflr88@gmail.com>
Close #6