Bug 34159 [Tasks] First three columns of Task List too wide w/native table
The type, completion, and priority columns of the Task list using the native table widget on MacOS X are much wider than are necessary for displaying the icons in those columns and appear not to be resizable.
bundles/org.eclipse.ui.views/src/org/eclipse/ui/views/tasklist/TaskList.java
*
	 * @return the current selection (element type: <code>IMarker</code>)
	 */
	public ISelection getSelection() {
		return viewer.getSelection();
	}
	/**
	 * Returns the message to display in the status line.
	 */
	String getStatusMessage(IStructuredSelection selection) {
		if (selection != null && selection.size() == 1) {
			IMarker marker = (IMarker) selection.getFirstElement();
			return MarkerUtil.getMessage(marker);
		}
		
		TaskListContentProvider provider = (TaskListContentProvider) viewer.getContentProvider();
		
		if (selection != null && selection.size() > 1) {
			return provider.getStatusSummarySelected(selection);
		} else {
			return provider.getStatusSummaryVisible();
		}
	}
	/**
	 * When created, new task instance is cached in
	 * order to keep it at the top of the list until
	 * first edited. This method returns it, or
	 * null if there is no task instance pending
	 * for first editing.
	 */