fix 'failed to install translation' message when misc/locale in hedgewars.ini is empty (which is *always* when 'system default' is selected)

cleaning up my own mess, turned out the italian translation has more descriptions than the english one XD

reintroduce the notice for restarting frontend after changing language

cleaning up nemo's mess :P ( re3407eef6b5474b2a3ea49ea49e354dc05144005 )

check for network for feedback dialog too

remove delays from "one of everything" weaponset it doesn't make sense to have the default delays on stuff like baseball bat, cake etc. when you can just use melons/hellish grenades etc. straight from the go

reintroduce the notification message in case you access dlc page without internet connection