fix Node.delete
add create child method to Node class
can't create node with duplicate name, update old node
update to Class-based
add no connection exeption, fix save settings
larger icons to mobile version
add prefix browse (for acces to node "settings", "no-connection", ...)
move TreeController, SettingsController to separated files
hide view/editor if isn't selected node
rm disc from tree list
show last part of path, add levels (margin-left 15) in tree
add reset settings
pretty settings