Bug 208055 [Markers] Need a sorting method for the markers view
As there is currently no accessible way to change sort order or direction. A menu should be enough.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/MarkerContentGenerator.java
boolean andFilters() {
		return andFilters;
	}
	/**
	 * Set whether the filters are being ANDed or ORed.
	 * 
	 * @param and
	 */
	void setAndFilters(boolean and) {
		andFilters = and;
	}
	/**
	 * Set the primary sort field for the receiver.
	 * 
	 * @param field
	 */
	void setPrimarySortField(MarkerField field) {
		getComparator().setPrimarySortField(field);
	}
	/**
	 * Return whether or not markerField is the primary sort field.
	 * 
	 * @param markerField
	 * @return boolean
	 */
	boolean isPrimarySortField(MarkerField markerField) {
		return getComparator().getPrimarySortField().equals(markerField);
	}
	/**
	 * Get the sort direction of field