Chat fix, ammo mechanics and tutorial improvements are added!

Full changelog:
+ Reworked ammo usage, now chance to use ammo in fight is higher, but ammo rate itself is lower in overwhelming fights in favor of player, close fights will still use a lot of ammo!
+ Now it's displayed how much ammo rounds are used or percentage of the magazine This means on weak enemies, ammo usage can be as low as 1 bullet / arrow, but for tough fights it's still required to stock up on ammo
+ Reduced ammo usage for bows
+ Increase drop rates for all bullets by 2x except .339 Lapua M, 25x40 mm
+ Combat Power in Very Close range is a bit more dependent on melee weapons now
+ Feral dogs made weaker (still not possible to defeat with a stick and low melee skill)
+ Fixed chat issues with messages disappearing
+ Number of encounter bugfixes
+ Improved UI in intro page
+ Tutorial improvements
+ Vehicle durability mechanics improved: Now after crafting vehicle, it will not break for first 500 squares traveled (instead of 200 before), small chance to lose durability point after that, after another durability point is lost it's guaranteed to not break again for 300 traveled squares, after that vehicle has a small chance to lose durability point again.
+ Reduced fuel usage for vehicles by 25%
+ the game is reloaded if map gets broken upon activating App or browser tab again.