Current path not always updated properly

[codeling]

In some situations, the current folder is not updated properly; typically after opening a file, when going to "File"->"Open" again, the dialog should show the folder of the file just opened.

This does not happen in the following scenarios:

• When opening a file after a project, the current path should be the project path
• When open_iA is opened with a filename argument so that the file is immediately loaded (e.g. if using the "Open With" functionality from Windows Explorer, to open e.g. an .mhd file directly), the current path is not updated

[codeling]

fixed in main / develop with the dataset rework.