[502836] Update MatchAccessor : handle diff

MatchAccesor can now be instanciated with a Diff in addition to Match.
It allows to fix the SMV/CMV synchronization problem for some matches in
the SMV that were not displayed in the CMV after double-click.

Bug: 502836
Change-Id: I4a297c00044b1c858fa9d563f779073d9cf5021d
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
10 files changed