BS-2755
Remove the "show label" check button on the general view for form
buttons + add a validator to show an error if expression is empty
Merge branch 'master' into FT2427_RepairAPI
BS-944 Add an initialization of messageContent attribute in Message element while migration from 5.9/5.10 + tests
BS-944 correction of conflict
Changed activeWhen by enableWhen property in handlers for Undo/Redo
command in the Edit menu
BS-2071

Add migration of returnType and referenced elements of Connector of 5.x to Operation in 6.x. + add test

Conflicts:
	bundles/plugins/org.bonitasoft.studio.importer.bar/src/org/bonitasoft/studio/importer/bar/custom/migration/connector/Connector5Descriptor.java
BS-937 & BS-2075

Custom connector V5 to V6 migration
- input return type
- output type and return type

Conflicts:
	bundles/plugins/org.bonitasoft.studio.connectors/src/org/bonitasoft/studio/connectors/extension/AbstractConnectorDefinitionMapper.java
	bundles/plugins/org.bonitasoft.studio.connectors/src/org/bonitasoft/studio/connectors/extension/IConnectorDefinitionMapper.java
BS-937 & BS-2075

Set referenced element as a Definition OUtput instead of an expression.
BS-2072

Add 2 steps in the pattern expression migration :
- Before parsing content, remove the "&nbsp;" by whitespace to remove the # character that appeared in the message of email connector
- If a dependencies recognized in the message, if it already has the ${} around it, not added a second time.

Conflicts:
	bundles/plugins/org.bonitasoft.studio.migration/src/org/bonitasoft/studio/migration/custom/migration/expression/PatternExpressionMigration.java
Merge branch 'master' into FT2427_RepairAPI

Conflicts:
	bundles/plugins/org.bonitasoft.studio.connectors/messages.properties
	bundles/plugins/org.bonitasoft.studio.console.libs/META-INF/MANIFEST.MF
	patched-plugins/org.eclipse.jdt.core/jdtCompilerAdapter.jar
	platform/platform.target
Merge remote-tracking branch 'origin/master' into FT2427_RepairAPI
BS-2287

Changed activeWhen by enableWhen property in handlers for Undo/Redo command in the Edit menu

Conflicts:
	bundles/plugins/org.bonitasoft.studio.application/plugin.xml
BS-2287

Remove extra activeWhen balise
merge with master
fix classpath
merge with master
Merge remote-tracking branch 'origin/master' into FT2427_RepairAPI

Conflicts:
	bundles/plugins/org.bonitasoft.studio.connectors/.classpath
Merge remote-tracking branch 'origin/master' into FT2427_RepairAPI
Merge remote-tracking branch 'origin/master' into FT2427_RepairAPI
fix merge