added automatic mapvote support for murder

added a note in chat when calling a map / gamemode vote as a reminder that there's now two chat commands which start different votes

+ fixed second mapvote not working after first one was cancelled

fixed gamemodesjson being loaded incorrectly causing random maps to appear in mapvote for chosen gamemode

added ulx blacklist tab to menu for assigning maps to gamemodes

added image cache for !mvmenu to speed things up, added map count for each assigned prefix, rightclick on prefix to show all viable maps, added refresh tab button to !mvmenu>Gamemodes>'Assign Maps and Prefixes to Gamemodes' GUI

+ replaced replay button with extend button (now just extends current map session instead of reloading it)
+ !gmvote and !mapvote now work with !gmvote starting a gamemode vote and !mapvote skipping it and instead just starting a mapvote

fixed server logo path (validated to be working)

fixed ratings starting with 1 count instead of 0 (should have been removed in a past update)

hotfix