Refactored GlobalScopeProvider, Statechart Editor is dirty aware now

plugins/org.yakindu.sct.model.stext/META-INF/MANIFEST.MF

@@ -21,7 +21,8 @@ Require-Bundle: org.eclipse.xtext;visibility:=reexport,
  de.itemis.xtext.utils.gmf,
  org.eclipse.gmf.runtime.emf.core;bundle-version="1.4.1",
  org.yakindu.base.types;bundle-version="1.0.0",
- org.yakindu.base.types.scope;bundle-version="1.0.0"
+ org.yakindu.base.types.scope;bundle-version="1.0.0",
+ de.itemis.xtext.utils.jface;bundle-version="1.0.0"
 Import-Package: org.apache.commons.logging,
  org.apache.log4j,
  org.eclipse.xtext.builder.builderState,