Bug 127080 [Field Assist] widget disposed error on proposal insertion
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ContentProposalAdapter.java
/*
	 * The keystroke that signifies content proposals should be shown.
	 */
	private KeyStroke triggerKeyStroke;
	/*
	 * The String containing characters that auto-activate the popup.
	 */
	private String autoActivateString;
	/*
	 * Integer that indicates how an accepted proposal should affect the
	 * control. One of PROPOSAL_IGNORE, PROPOSAL_INSERT, or PROPOSAL_REPLACE.
	 * Default value is PROPOSAL_INSERT.
	 */
	private int proposalAcceptanceStyle = PROPOSAL_INSERT;
	/*
	 * A boolean that indicates whether key events received while the proposal
	 * popup is open should also be propagated to the control. Default value is
	 * true.
	 */
	private boolean propagateKeys = true;
	/*
	 * Integer that indicates the filtering style. One of FILTER_CHARACTER,
	 * FILTER_CUMULATIVE, FILTER_NONE.
	 */
	private int filterStyle = FILTER_NONE;
	/*
	 * The listener we install on the control.
	 */
	private Listener controlListener;
	/*