ToggleButtons in the automatically generated effects UI are stretched vertically
Steps to reproduce:
- Create a new project
- Add a clip
- Click it to select it
- In Effects Library, douoble-click AgingTV effect to add it. Notice in the middle pane the automatically generated UI for configuring the effect has the radio buttons stretched vertically. They should not occupy the entire vertical space, only as much as they need.
GstElementSettingsWidget.add_widgets generates the UI for the effects for which we don't have yet a custom UI:
def add_widgets(self, create_property_widget, values=None, with_reset_button=False, caps_values=None): """Prepares a Gtk.Grid containing the property widgets of an element.