[435371] Add diagram.ecore to the build.properties

Bug: 435371
Change-Id: I228686c83f29124f3163cfac4f070551ba1006d6
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
[426687] Make session saving optional in SiriusUncontrolCommand

Reproduce the same pattern as for SiriusControlCommand.

Bug: 426687
Change-Id: I3c3982fc35d08b52686379e4243050bccf2a18d9

Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
[427803] Fix a bad icon path for deleted semantic element

Also remove a duplicate entry in licence.txt for this icon.


Bug: 427803
Change-Id: I571c17aed78b207325a8a07b5353f1dfabfa5234
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>
[435614] Copy the list of sessions before iterate on it.

This avoids potential ConcurrentModificationException.

Bug: 435614
Change-Id: Ic59596479133221e5cfecfe6db1faf215968d898
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>