BS-1379, update exporter to have the type on left operand and to export transient data as expression type
BS-1379, fix export of string indexe expression + add unit tests
Merge branch 'master' into BS-1379_TransientData

Conflicts:
	bundles/plugins/org.bonitasoft.studio.common/src/org/bonitasoft/studio/common/ExpressionConstants.java
	bundles/plugins/org.bonitasoft.studio.engine/src-test/java/org/bonitasoft/studio/engine/export/EngineExpressionUtilTest.java
	bundles/plugins/org.bonitasoft.studio.engine/src/org/bonitasoft/studio/engine/export/EngineExpressionUtil.java
	bundles/plugins/org.bonitasoft.studio.engine/src/org/bonitasoft/studio/engine/export/switcher/AbstractSwitch.java
	bundles/plugins/org.bonitasoft.studio.engine/src/org/bonitasoft/studio/engine/export/switcher/FlowElementSwitch.java
	bundles/plugins/org.bonitasoft.studio.exporter/src/org/bonitasoft/studio/exporter/form/FormsExporter.java
adapt after engine merge
Merge branch 'master' into 'BS-1379_TransientData'
Merge branch 'MasterBugFixing' into 'InnoBugFixing'
fix forms exporter tests
Merge branch 'master' into 'BS-1379_TransientData'
fix bad merge
BS-7958
Use abstraction for Refactoring operations + add unit tests
Add monospaced font
BS-6407
fix export, add correlation if start message is in an event subprocess
Fix tests
BS-2821
Retrieve new connectors
fix talend connector
BS-7999
Fix npe
fix welcome dynamique
BS-8459
add/update warning message
fix connector wizard
Merge branch 'master' into 'BS-1379_TransientData'