#202 bug: operations (add/remove) on first level of file nodes aren't
displayed on client
#202 - [bug] icons from sidebar added only for a mindmap node
#202 [bug] remove buttons from icons view doesn't work anymore
#202 New File/Folder -> icon
#202 [bug] error when clicking on "..." button from Properties -> Icons
#202 [bug] when node name too long, properties view width too long
#202 [bug] New File/Folder & Rename -> focus on text at init.