Plugin-Editor: option use of tabs in file

I usually use Notepad++ instead of the internal qml editor, because this supports qml with highlighting and some other nice features during programming...
I also use tabs instead of blanks here, and the default for me is 4 blanks wide.
Unfortunately the internal qml editor is set to use 6 blanks for a tab - no way to set this value anywhere.
The best in my opinion would be that the editor (optionally) uses real tabs, so there will be no conflict at any point. Or, to allow to redefine the tab width somewhere.