Fix mention-related issues
Fix mention-related issues

The mention search is now only triggered if the user paused half a second during typing. Furthermore, previous AJAX requests are now aborted fixing issues when "delayed" requests return their data even though they are not needed anymore.

ramiusGitHub/WCF,joshuaruesweg/WCF,joshuaruesweg/WCF,MenesesEvandro/WCF,SoftCreatR/WCF,NBZ4live/WCF,ramiusGitHub/WCF,Cyperghost/WCF,Morik/WCF,0xLeon/WCF,0xLeon/WCF,WoltLab/WCF,SoftCreatR/WCF,MeinAccount/WCF,Morik/WCF,SoftCreatR/WCF,joshuaruesweg/WCF,Cyperghost/WCF,NBZ4live/WCF,WoltLab/WCF,cashcat/WCF-1,WoltLab/WCF,0xLeon/WCF,WoltLab/WCF,Cyperghost/WCF,Morik/WCF,Cyperghost/WCF,Cyperghost/WCF,cashcat/WCF-1,Morik/WCF,MeinAccount/WCF,SoftCreatR/WCF,MenesesEvandro/WCF