WIP: splittable views
Adjust splitting
Import(Session)TreeWidget from Communi-desktop
Move completer within util/
Update backend
Update backend
Use IrcCompleter
Update backend
Fix topic label height
Connection state saving & restoring
Fix MainWindow::closeBuffer()
Fix ConnectPage::reset()
LineEditor: remove obsolete completion related code
Update backend
TextBrowser: "activate" documents lazily
Make Document::add() and remove() static
ChatPage::addConnection(): ensure server buffer document
Sort IrcBufferModel by title
Update backend
Fix ItemDelegate::dark initialization