Cannot switch between normal Editor and Text Editor for qrc files

Steps to reproduce:

• open a qrc file inside an Editor (context menu on the qrc file -> 'Open in Editor')
  • qrc file is opened inside the standard editor (gui to edit the file)
• invoke the context menu again on the qrc file node and try to invoke 'Oepn in Text Editor'

Current result:

• nothing happens - as the qrc file is opened already
• you have to close the qrc file before it's possible to open it inside the Text Editor again

Expected result:

• the qrc file is opened a second time or the current view of the doc is switched to the other respective Editor