[snipmatch] Bug 446263: Move PCSelectionDialog to *.models.rcp

Change-Id: I624c6d55528c7ead0e186ee379da0bb38ea795a8
Signed-off-by: Olav Lenz <olav.lenz@gmail.com>
Signed-off-by: Johannes Dorn <johannes.dorn@codetrails.com>