Bug 214137 [Markers] Unbound system filters should be bound to problems view.
In 3.3 we supported systemFilters which are not currently picked up by the problems view. We should pick these up for compatiblity.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/views/markers/DescriptionFieldFilter.java
DescriptionFieldFilter clone = (DescriptionFieldFilter) copy;
		clone.containsModifier = this.containsModifier;
		clone.containsText = this.containsText;
	}
	/**
	 * Return the contains modifier.
	 * 
	 * @return One of {@link MarkerSupportConstants#CONTAINS_KEY} or
	 *         {@link MarkerSupportConstants#DOES_NOT_CONTAIN_KEY}
	 */
	public String getContainsModifier() {
		return containsModifier;
	}
	/**
	 * Set the contains modifier.
	 * 
	 * @param containsString
	 *            One of {@link MarkerSupportConstants#CONTAINS_KEY} or
	 *            {@link MarkerSupportConstants#DOES_NOT_CONTAIN_KEY}
	 */
	public void setContainsModifier(String containsString) {
		this.containsModifier = containsString;
	}
	/**
	 * Return the text to apply the containsModifier to.
	 * 
	 * @return String
	 */
	public String getContainsText() {
		return containsText;