aggregator: does not forward navigation events
This was found running this pipeline using the wpesrc plugins. (Master)
Navigation events are forwarded without the glvideomixer with this pipeline: gst-launch-1.0 -v wpesrc location="https://gstreamer.freedesktop.org" ! queue ! glimagesink"
When including glvideomixer the navigation events are not forwarded
Example: gst-launch-1.0 glvideomixer name=m sink_0::zorder=1 ! glimagesink sync=false async=false wpesrc location="http://www.google.com" draw-background=1 ! video/x-raw(memory:GLMemory),height=720,width=1280 ! m.sink_0