GtkPaned: Add a "wide-handle" property

This can be used by applications to indicate that a paned is expected
to be actively used by the users for configuring the UI, and needs
a prominent handle.

https://bugzilla.gnome.org/show_bug.cgi?id=738860
Updated Spanish translation
Updated Spanish translation
Adwaita: GtkPlacesSidebar treeview text color fix

With my latest changes we have a darker text color for views and
entries (which I assume are content), the places sidebar is totally
chrome though so it needs the chrome text color back.