[UI Tests] Update UI tests

Change-Id: I0908f6c624d1d353adb17c6c082ee611677e5754
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
Fix random order of ResourcesAttachmentChanges in SMV

Fix regression from e28f6d6e172ad4440bba23927f4373a7ed4a47c7

Change-Id: I5b0e230315a8dfdd9c3271aa1903dd94b5668529
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
Fix Undo for ContentMergeViewers

Fix regression from 7be95a4a92647bfe08da95761998d6e9bbdcac7e

Change-Id: I550fe71f940cecdf0e619e9768dc165974f9b97f
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
[454735] ExpandCollapseListener raises potential NPE

Change-Id: Iaca46974001f2710cdde732a6193acd7a022d26c
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
[UI Tests] Update UI Test