GTK3 FileChooser does not provide signal for filter-changed
Current behavior
FileChooser does not send out a signal when a different file filter is chosen.
Expected outcome
A signal is sent when a different filter is chosen
Version information
Linux, GTK 3.24.30
Additional information
See https://bugs.eclipse.org/bugs/show_bug.cgi?id=578096, but the main point is to auto extend the file-extension to the name of a file.