[plugin_installer] Fallback icon does not scale correctly
Plugins without specified icon are displayed with a fallback icon:
FALLBACK_ICON = Gtk.IconTheme.get_default().load_icon( 'preferences-system', Gtk.IconSize.MENU, 0)
On Windows this works for me as intended with a 16px icon but on my linux machine the fallback icon is not scaled correctly (see screenshot).
My guess is that the IconTheme has no icon available in 16px (higher values work though, e.g. 128). Is there a way to force resizing?
Otherwise one could change the fallback icon to one already shipped with Gajim/plugin_installer (e.g. plugin_installer.png).