refactor(import_export_dialog_base|view): cleanup subclassing implementation

4 jobs for fix in 18 minutes and 31 seconds (queued for 2 seconds)
Status Name Job ID Coverage
  Qa
passed clone #1644487

00:00:35

passed fmt #1644486

00:01:08

 
  Build
passed clippy #1644488

00:10:16

passed flatpak #1644489
flatpak

00:17:22