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.
3 jobs for fix/file-chooser in 2 minutes and 32 seconds (queued for 101 minutes and 35 seconds)
Status Job ID Name Coverage
  Test
passed #81052
build

00:01:04

passed #81050
clazy

00:01:06

passed #81051
qmllint

00:00:21