Bug 42587 Left over from content assist
M3 - set preference that content assist should overwrite - open content assist on some word so that the rest of the word is indicated to be overwritten - transfer focus to the content assist widget using TAB - Esc -> overwrite indication is still there
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/link/contentassist/PopupCloser2.java
private ContentAssistant2 fContentAssistant;
	
	private Table fTable;
	
	private ScrollBar fScrollbar;
	
	private boolean fScrollbarClicked= false;
	
	/**
	 * Installs this closer on the given table opened by the given content assistant.
	 *