Bug 192630 [FieldAssist] auto activation of proposal popup should be canceled on keystroke
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
* the proposal popup while it is open. Popup-based filtering is useful for
	 * narrowing and navigating the list of proposals provided once the popup is
	 * open. Filtering of the proposals will occur even when the control content
	 * is not affected by user typing. Note that automatic filtering is not used
	 * to achieve content-sensitive filtering such as auto-completion. Filtering
	 * that is sensitive to changes in the control content should be performed
	 * by the supplied {@link IContentProposalProvider}.
	 * 
	 * @param filterStyle
	 *            a constant indicating how keystrokes received in the proposal
	 *            popup affect filtering of the proposals shown.
	 *            <code>FILTER_NONE</code> specifies that no automatic
	 *            filtering of the content proposal list will occur as keys are
	 *            typed in the popup. <code>FILTER_CUMULATIVE</code> specifies
	 *            that the content of the popup will be filtered by a string
	 *            containing all the characters typed since the popup has been
	 *            open. <code>FILTER_CHARACTER</code> specifies that the
	 *            content of the popup will be filtered by the most recently
	 *            typed character.
	 */
	public void setFilterStyle(int filterStyle) {
		this.filterStyle = filterStyle;
	}
	/**
	 * Return the size, in pixels, of the content proposal popup.
	 * 
	 * @return a Point specifying the last width and height, in pixels, of the
	 *         content proposal popup.
	 */
	public Point getPopupSize() {