Bug 206489 [Markers] Tasks column too small in the new markers view
Tasks column too small in the new markers view. We need to take into account the twistie.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/internal/provisional/views/markers/ExtendedMarkersView.java
cachedValues[i] = fields[i].getValue(item);
			}
		}
		/**
		 * Return whether or not the entry is equivalent to the cached state.
		 * 
		 * @param item
		 * @return boolean <code>true</code> if they are equivalent
		 */
		boolean isEquivalentTo(MarkerItem item) {
			MarkerField[] fields = builder.getGenerator().getVisibleFields();
			if (cachedValues.length != fields.length)
				return false;
			for (int i = 0; i < fields.length; i++) {
				if (cachedValues[i] == fields[i].getValue(item))
					continue;
				return false;
			}
			return true;
		}
	}
	private static int instanceCount = 0;
	private static final String TAG_GENERATOR = "markerContentGenerator"; 
	private static final String TAG_HORIZONTAL_POSITION = "horizontalPosition"; 
	private static final String TAG_VERTICAL_POSITION = "verticalPosition"; 
	private static final String MARKER_FIELD = "MARKER_FIELD"; 
	/**
	 * Return the next secondary id.
	 * 
	 * @return String