merge Language and Formats

BUG: 192019
BUG: 341235
BUG: 344588
BUG: 394477
BUG: 397974
BUG: 397975
BUG: 403580
BUG: 417564
BUG: 420268
BUG: 429474
BUG: 431292
BUG: 444772
BUG: 446785
BUG: 447787
BUG: 448324
BUG: 448355
BUG: 451919
BUG: 451944
BUG: 454991

closes plasma/plasma-workspace#23