add tree button to seperate view
add lisener to button "Bearbeiten" in mainheader
add toggle for tree buttons
enable tree tool button toggle
add before drop listener to treeview
add replace static html by iframe
add drop controller
add disable/enable drag&drop function
move draganddrop listener to controller
use debug library instead of minified
add warning message before dropping node
customize drag and drop message box
replace remove windows by message box
correct text message for delete message box
disable tree sort
create node only when a node is selected
adjust fields of tree model
adjust fields of allgemein model
ajust allgmemein data to fields in model
add attribute for linking treenode and allgemein