Fix file dialog and media drawer opening

The 'mediaDrawer' did not open before.
The file dialog had an invalid name filter before which resulted in only showing directories.

The 'fileChooser' opens with a correct name filter and uses Enums for all available name filters now.
An unused argument of 'openFileDialog()' is removed.
parent a19767de
Pipeline #42915 passed with stage
in 2 minutes and 32 seconds