Bug 192630 [FieldAssist] auto activation of proposal popup should be canceled on keystroke
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
*/
	private int autoActivationDelay = 0;
	/*
	 * A boolean indicating whether a keystroke has been received. Used to see
	 * if an autoactivation delay was interrupted by a keystroke.
	 */
	private boolean receivedKeyDown;
	/*
	 * The desired size in pixels of the proposal popup.
	 */
	private Point popupSize;
	/*
	 * The remembered position of the insertion position. Not all controls will
	 * restore the insertion position if the proposal popup gets focus, so we
	 * need to remember it.
	 */
	private int insertionPos = -1;
	/*
	 * The remembered selection range. Not all controls will restore the
	 * selection position if the proposal popup gets focus, so we need to
	 * remember it.
	 */
	private Point selectionRange = new Point(-1, -1);
	/*
	 * A flag that indicates that a pending modify event was caused by the
	 * adapter rather than the user.
	 */
	private boolean modifyingControlContent = false;
	/**
	 * Construct a content proposal adapter that can assist the user with