ThemeManager: Unify translations

Patch Set 1:    * use correct copyright
                * remove unneeded comments and lines
                * remove the period from the description strings

Patch Set 2-3:  * update copyright
                * revert some changes
                * separate translations for phone and tablet

Patch Set 4-7:  * update Russian, French, Dutch, Chinese Hungarian
                  and Indonesian strings

Change-Id: I39b311d0ee5921e7e58969439e2da709ace3895a