add missing initializers for 'dlc' variables for the 3 default generated map types (fixes 3 clang warnings)

don't generate any map previews until they are actually visible. this should improve hedgewars startup performance on weak machines

fixed moving npc and flying in forbidden area in ice01

fixed overlapping bubbles and wrong dialog triggering in moon01

don't abort changeammo on attacking/attacked in infattack mode, keep scrolling through slot after setweap even if a multishoot was aborted triggering gstattacked, to ensure proper ammo gets set for next turn

Make sticky mine respect lfBouncy, make hogs do same, kinda... make uCollisions return land w/ mask, restrict bouncy to advbounce gears only, which means piano doesn't bounce anymore

Fix erroneous message in console debug

Show "incompatible version" message instead of "no such room" on try to join room with another protocol version

fix for regression issue #669 "Lobby: User context-menu of offline user shows all options as if user was still online"

small cleanup etc