Used concurrenthashmap instead of standard hashmap
Started implementation of query user
Continued implementation of query user
Changed nicks in nicklist to buttons
Added query support in IPA.
Fixed receiving messages
Fixed loading private message channels from database
Mad whole user list item in right drawer clickable
Fixed leaving a userquery channel
Fixed background on focus on users in right drawer
Fixed some concurrency issues
Merge branch 'feature/fix-concurrency-issues' into develop
Merge branch 'feature/query-user' into develop