Bug 144522 [Field Assist] - should proposal popup ever open if empty?
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
Shell controlShell = control.getShell();
					controlShell.removeListener(SWT.Move, this);
					controlShell.removeListener(SWT.Resize, this);
				}
			}
		}
		/*
		 * The listener we will install on the target control.
		 */
		private final class TargetControlListener implements Listener {
			
			public void handleEvent(Event e) {
				if (!isValid()) {
					return;
				}
				char key = e.character;
				
				
				if (e.type == SWT.Traverse) {
					
					
					
					
					
					if (key != 0) {
						e.doit = false;
						return;
					}