Fix "button hang" after cancelling browse action in Geotagging screen. This had to
do with the fact that I set some variables incorrectly.
wrong: self.LineEdit_geotag_source_folder.setText(self.geotag_source_folder)
Correct:
self.LineEdit_geotag_source_folder.setText(geotag_source_folder)
self.geotag_source_folder = geotag_source_folder