Adds filter to the list of filters that the user can select between.
When a filter is selected, only files that are passed by that
filter are displayed.
Note that the chooser takes ownership of the filter, so you have to
ref and sink it if you want to keep a reference.
Since 2.4
Adds filter to the list of filters that the user can select between. When a filter is selected, only files that are passed by that filter are displayed. Note that the chooser takes ownership of the filter, so you have to ref and sink it if you want to keep a reference. Since 2.4