There is exactly one implementation of css.frame.FrameControl (which demands a
property named "ComponentUrl" not "ComponentURL"), and exactly one place where
that property is used.  So switch those two places to use the spelling of the
property name as documented in the UNOIDL service.  (Even though that can be
considered an incompatible change, in the unlikely case that 3rd party code
expects to be able to access the given implementation's property with the mis-
spelled name.)

Change-Id: I4fa3f21851b61079c09deea1a24aac22bc96f36f
Reviewed-on: https://gerrit.libreoffice.org/51766Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Stephan Bergmann <sbergman@redhat.com>