Update screenshots of various games v2

Rebased !74 (closed). Game screenshots to be updated:

1. Bomber
2. Granatier
3. Kapman
4. KAtomic
5. KBlocks
6. KBounce
7. KBreakOut
8. KGoldRunner
9. Killbots
10. Klickety
11. KMines
12. Kolf
13. Kollision
14. Konquest
15. KSnakeDuel
16. KSpaceDuel
17. KSudoku
18. Kubrick
19. LSkat
20. Skladnik