[475685] Have icon and label refreshed on semantic change

- Manage the case of XXXItemProvider.getImage()/getText() customization.
Indeed in some customization, for example on
uml::NamedElement.visibility change,
XXXItemProvider.getImage()/getText() returns an image with a decoration
different according to uml::NamedElement.visibility attribute value.
- This fix a regression from e7d07c250cebf1f413fcd0d9c3ad36fecaddd399 :
[443518] Use DialectServices2.refreshImpactedElements() to refresh DDE.

Bug: 475685
Change-Id: I75b9b86e22f017a66df2d5165f0ad79bf602c791
Signed-off-by: Esteban Dugueperoux <esteban.dugueperoux@obeo.fr>
7 files changed