Bug 20700 Code assist activates help UI
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/CompilationUnitEditor.java
String p= event.getProperty();		
				
				if (SPACES_FOR_TABS.equals(p)) {
					if (isTabConversionEnabled())
						startTabConversion();
					else
						stopTabConversion();
					return;
				}
				
				if (MATCHING_BRACKETS.equals(p)) {
					if (isBracketHighlightingEnabled())
						startBracketHighlighting();
					else
						stopBracketHighlighting();
					return;
				}
				
				if (MATCHING_BRACKETS_COLOR.equals(p)) {
					if (fBracketPainter != null)
						fBracketPainter.setHighlightColor(getColor(MATCHING_BRACKETS_COLOR));
					return;
				}
				
				if (CURRENT_LINE.equals(p)) {
					if (isLineHighlightingEnabled())
						startLineHighlighting();
					else
						stopLineHighlighting();
					return;