move to GList instead of GHashTable.
move to GList instead of GHashTable.

We cannot use a hash for iso and having the same loading code for
all properties is indeed better. We also don't have a lot of values
so using a list is not a big issue

foolab/gst-droid,foolab/gst-droid,sledges/gst-droid,mlehtima/gst-droid,mlehtima/gst-droid,sledges/gst-droid,sailfishos/gst-droid,sledges/gst-droid