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
if (newProposals.length > 0) {
					selectProposal(0);
				} else {
					
					if (infoPopup != null) {
						infoPopup.close();
					}
				}
			}
		}
		/*
		 * Get the string for the specified proposal. Always return a String of
		 * some kind.
		 */
		private String getString(IContentProposal proposal) {
			if (proposal == null) {
				return EMPTY;
			}
			if (labelProvider == null) {
				return proposal.getLabel() == null ? proposal.getContent()
						: proposal.getLabel();
			}
			return labelProvider.getText(proposal);
		}
		/*
		 * Get the image for the specified proposal. If there is no image
		 * available, return null.
		 */
		private Image getImage(IContentProposal proposal) {