Convert RID_SVXDLG_ASSIGNCOMPONENT to .ui

Change-Id: Id38ee64e22684905c1a0809d3649e54e893580e1
Reviewed-on: https://gerrit.libreoffice.org/10710
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>