Fix issue #570 (GoBack() slot connected twice)

Clear nickname in case of collision so client could try again. Should help with issue #550 if not fix it.

Rooms list/chat splitter from issue #612

Update ru localization

Fix issue with last hog's part of team health bar

Don't accept keyboard/mouse events on startup phase

Use old method of locale detection, fallback to new one in case of problems

Add gstFrozen state to mines/gears in range on frozen land creation, and set the mines to dud state. gstFrozen does nothing yet. Visually or otherwise.