[test] factorize a DialectEditorDialogFactory to be used for test

Change-Id: I24c8536a27a6ec28fe2c59a42529cc6db4793814
[version] Bump version to 2.0.0

Change-Id: Ic21dc458e70986d3625500eaef74fb24a63b8106
Signed-off-by: Pierre-Charles David <pierre-charles.david@obeo.fr>
Merge "[test] factorize a DialectEditorDialogFactory to be used for test"