KURLRequester not using correct folder when opening file picker on Gnome

[milianw]

Describe the bug

If you have some file preselected in the KUrlRequester as used by e.g. the Record page for the application binary, if you then click on the icon to show the file picker then on Gnome, a potentially completely different directory is shown.

To Reproduce

1. cd /tmp
2. open hotspot on gnome
3. go to record page
4. enter /usr/bin/ls as application
5. click on icon next to application to open file picker

Expected behavior

File picker should show /usr/bin, but it probably shows /tmp.

Additional context

Works fine on KDE, so probably some Gnome issue, unsure if we can solve this directly...