BS-12168_PageBuilder_Integration

Conflicts:
	bundles/plugins/org.bonitasoft.studio-models/process.ecore
	bundles/plugins/org.bonitasoft.studio-models/process.genmodel
	bundles/plugins/org.bonitasoft.studio-models/process.gmfgen
	bundles/plugins/org.bonitasoft.studio-models/process.gmfmap
	bundles/plugins/org.bonitasoft.studio-models/process.history
	bundles/plugins/org.bonitasoft.studio.common/src/org/bonitasoft/studio/common/ExpressionConstants.java
	bundles/plugins/org.bonitasoft.studio.common/src/org/bonitasoft/studio/common/emf/tools/ModelHelper.java
	bundles/plugins/org.bonitasoft.studio.diagram/META-INF/MANIFEST.MF
	bundles/plugins/org.bonitasoft.studio.expression.editor/src/org/bonitasoft/studio/expression/editor/widget/ContentAssistText.java
	bundles/plugins/org.bonitasoft.studio.validation/plugin.xml