Bug 132798 [Field Assist] - Pressing Backspace at offset 0 should not reload field assist popup
N20060322-0010. After migrating the Find/Replace dialog to the new field assist support I found the following blooper: pressing the Backspace key at offset 0 reloads the field assist popup. Test Case: 1. in a text editor press Ctrl+F 2. enable regex search 3. in the Find filed press Ctrl+Space 4. continuously press Backspace ==> each time the proposal list is reloaded.
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
private String filterText = EMPTY;
		/**
		 * Constructs a new instance of this popup, specifying the control for
		 * which this popup is showing content, and how the proposals should be
		 * obtained and displayed.
		 * 
		 * @param infoText
		 *            Text to be shown in a lower info area, or
		 *            <code>null</code> if there is no info area.
		 */
		ContentProposalPopup(String infoText) {
			
			
			
			
			
			
			
			super(control.getShell(), SWT.RESIZE | SWT.ON_TOP, false, false,
					false, false, null, infoText);
			this.proposals = getProposals(filterText);
		}
		/*
		 * Overridden to force change of colors.
		 * See https://bugs.eclipse.org/bugs/show_bug.cgi?id=136244
		 * (non-Javadoc)
		 * @see org.eclipse.jface.dialogs.PopupDialog#createContents(org.eclipse.swt.widgets.Composite)
		 */
		protected Control createContents(Composite parent) {
			Control contents = super.createContents(parent);