Fix "Preferences" Context Menu Entry Label

Actions that open a dialog should be suffixed with "...". In the
"Progress" view this was missing.

Author: BeckerWdf

bundles/org.eclipse.ui.workbench/eclipseui/org/eclipse/ui/internal/messages.properties

@@ -124,7 +124,7 @@ Workbench_showInNoTargets = <No Applicable Views>
 Workbench_showInNoPerspectives = <No Applicable Perspectives>
 Workbench_noApplicableItems = <No Applicable Items>
 
-OpenPreferences_text = &Preferences
+OpenPreferences_text = &Preferences...
 OpenPreferences_toolTip = Preferences
 
 # --- Window Menu ---