Instead of just the current one.

Resources are explicitly loaded in context_apply_draw_state() when needed, the
resource location management takes care of all of this.

Leaving the lock is legal and required here since gstreamer has its
own locking in place. gst_pad_push could otherwise deadlock.

shdocvw: Implement UniformResourceLocatorW_InvokeCommand and UniformResourceLocatorA_InvokeCommand for the default verb.

Try as I might, I couldn't get a path out of GetIconLocation that wasn't
put there via SetIconLocation.  As far as I can tell, the code here was 
based on nothing.