Unreplaced marker in fileadmin
Following steps to reproduce the problem:
1. Create a folder in fileadmin containing 2 subfolders (Test A, Test B)
2. Click on one of the subfolders so its content is displayed in the right frame
3. Move the selected folder into the other one using Drag&Drop in the folder tree
4. Both frames reload. The right frame shows an error message: "Folder not found. The folder "1:/test/test_B/" cannot be accessed. Trying to use parent folder(s)."
5. There is an unreplaced marker "###PASTE###" on the top of the frame.