Changes

[releng] Fix the build for Guava 21

Change-Id: Ifcae7c749f801cc2ed51caca22d360126472607e
Signed-off-by: Stéphane Bégaudeau <stephane.begaudeau@obeo.fr>

[516668] Introduce arbitrary ID's to identify EObjects

This commit introduce arbitrary ID's to identify EObject when a page is
computed in order to stop relying on EcoreUtil.getURI() which has a
number of problems
- performance is not great when having deep models (but arguably this
code is not a hot spot)
- the URI might change over time for a given EObject, for instance in
Ecore renaming an EClass will lead to a change of URI, and then a
spurious reset of the page (and the widget focus gets lost)

Bug: 516668
Change-Id: I392754c88fdee5bcaaf98043d4c2894559accc4b
Signed-off-by: Cedric Brun <cedric.brun@obeo.fr>

[515586] Handle dynamic mappings recursively for the force refresh

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=515586
Change-Id: Ie02fd19ac68e5253061661856c82589612df84f6
Signed-off-by: Stéphane Bégaudeau <stephane.begaudeau@obeo.fr>

[515701] Add an onClick expression on the reference widget

When the reference is:
* a single valued reference: if the on click expression is set, the
reference is represented as
an hyperlink else the reference is represented as a label
* a multi valued reference: if the on click expression is set, the
reference is represented as a
table with clickable lines

Bug: 515701
Change-Id: I1d3d74fa03ec78cd156ecbb0b57d772bab245250
Signed-off-by: Mélanie Bats <melanie.bats@obeo.fr>

[496080] Add support for indented pages

Bug: 496080
Change-Id: I99bd545b1a02a5e7770360eab3f446034dcc2069
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
Signed-off-by: Mélanie Bats <melanie.bats@obeo.fr>

[496069] Add support for images in the buttons and widget actions

Bug: 496069
Change-Id: I61c6f72a7ab8b233f9841894c66658863e52f5c2
Signed-off-by: Axel Richard <axel.richard@obeo.fr>
Signed-off-by: Mélanie Bats <melanie.bats@obeo.fr>