Bug 60415 Should remove Search extension page
I20040428 We should remove the search extension page and should make sure that participants can't damage a search. If a participant generates an exception the participant should be disabled for the rest of the Eclipse sessions. This is consistent with Platform/UI and refactoring.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/search/JavaSearchQuery.java
String getSingularLabel() {
		String desc= null;
		if (fPatternData instanceof ElementQuerySpecification) {
			IJavaElement element= ((ElementQuerySpecification)fPatternData).getElement();
			if (fPatternData.getLimitTo() == IJavaSearchConstants.REFERENCES
			&& element.getElementType() == IJavaElement.METHOD)
				desc= PrettySignature.getUnqualifiedMethodSignature((IMethod)element);
			else
				desc= element.getElementName();
			if ("".equals(desc) && element.getElementType() == IJavaElement.PACKAGE_FRAGMENT) 
				desc= SearchMessages.getString("JavaSearchOperation.default_package"); 
		} else {
			desc= ((PatternQuerySpecification)fPatternData).getPattern();
		}
		desc= "\""+desc+"\""; 
		String[] args= new String[] {desc, fPatternData.getScopeDescription()}; 
		switch (fPatternData.getLimitTo()) {
			case IJavaSearchConstants.IMPLEMENTORS:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularImplementorsPostfix", args); 
			case IJavaSearchConstants.DECLARATIONS:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularDeclarationsPostfix", args); 
			case IJavaSearchConstants.REFERENCES:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularReferencesPostfix", args); 
			case IJavaSearchConstants.ALL_OCCURRENCES:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularOccurrencesPostfix", args); 
			case IJavaSearchConstants.READ_ACCESSES:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularReadReferencesPostfix", args); 
			case IJavaSearchConstants.WRITE_ACCESSES:
				return SearchMessages.getFormattedString("JavaSearchOperation.singularWriteReferencesPostfix", args); 
			default: