Bug 76887 [content assist] Template validation is case sensitive
Test case: Type SYS Ctrl-Space Type o You are left with no code completions. This differs from the code completion proposals where the prefix matching is not case sensitive. (note this is a problem in both the JDT TemplateProposal and the JFace text TemplateProposal)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/template/contentassist/TemplateProposal.java
fSelectedRegion= new Region(getCaretOffset(templateBuffer) + start, 0);
			
		} catch (BadLocationException e) {
			JavaPlugin.log(e);
			openErrorDialog(viewer.getTextWidget().getShell(), e);		    
			fSelectedRegion= fRegion;
		} catch (BadPositionCategoryException e) {
			JavaPlugin.log(e);
			openErrorDialog(viewer.getTextWidget().getShell(), e);		    
			fSelectedRegion= fRegion;
		}
	}	
	
	/**
	 * Returns the currently active java editor, or <code>null</code> if it 
	 * cannot be determined.
	 * 
	 * @return  the currently active java editor, or <code>null</code>
	 */
	private JavaEditor getJavaEditor() {
		IEditorPart part= JavaPlugin.getActivePage().getActiveEditor();
		if (part instanceof JavaEditor)
			return (JavaEditor) part;
		else
			return null;
	}
	/**
	 * Returns the offset of the range in the document that will be replaced by
	 * applying this template.
	 *