[cleanup] Add conditions to avoid failing if resources are disposed when
session is closing with opened editors

Signed-off-by: Alex Lagarde <alex.lagarde@obeo.fr>
Change-Id: Ic829fda596e4d39da056d1ab1ac09211acee7891
[doc] Use relative URLs to refer to stylesheets

Change-Id: I75c66693b317e094fe0606293b89bda550235f70
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
[437528] Forcing an edge direction toward the center of a node. (Spec)

bug: 437528

Change-Id: Ib405905df3b5e7919b5d39f6d2c7e359ca853939
[437528] Regen the spec html file.

bug: 437528

Change-Id: Ib6d7c17b37bbf6e12d270a264dfcf6c91a1cd45b