QuickDesigner: Source code update fail

Steps to reproduce:

• open/create a Qml project using states (and open the file with the states inside the Designer)
• make sure to activate the integrated text editor & have current document state saved
• rename one or two states inside the integrated editor
• save the document
  • even now the state names aren't updated inside the state indicators (below the preview)
• click into the text edits of the state indicators
• if you have more than one additional state click into their text edits (holding their name) as well
  • you can see that the bar holding the line numbers gets markers of changed document lines (at least the lines with the state names, probably even more surrounding)
• switch to "normal" Edit mode
  • the states where you had clicked into the respective states name line edits now have their old name again (the names that had been displayed inside the states marker)
  • document is marked as unsaved as it contains modifications

Note: renaming states with the text edit of a state marker does not update the source code, too.