Bug 36511 call hierarchy: details list should be a table with icons
details list should be a table with icons - we can reuse the icons used by 'find in file'
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/callhierarchy/CallHierarchyViewPart.java
import org.eclipse.jdt.ui.actions.RefactorActionGroup;
import org.eclipse.jdt.internal.ui.JavaPlugin;
import org.eclipse.jdt.internal.ui.actions.CompositeActionGroup;
import org.eclipse.jdt.internal.ui.javaeditor.EditorUtility;
import org.eclipse.jdt.internal.ui.viewsupport.StatusBarUpdater;
import org.eclipse.jdt.internal.corext.callhierarchy.CallHierarchy;
import org.eclipse.jdt.internal.corext.callhierarchy.CallLocation;
import org.eclipse.jdt.internal.corext.callhierarchy.MethodWrapper;
/**
 * This is the main view for the callers plugin. It builds a tree of callers/callees
 * and allows the user to double click an entry to go to the selected method.
 *
 */
public class CallHierarchyViewPart extends ViewPart implements IDoubleClickListener,
    ISelectionChangedListener {
    public static final String CALLERS_VIEW_ID = "org.eclipse.jdt.callhierarchy.view"; 
    private static final String DIALOGSTORE_VIEWORIENTATION = "CallHierarchyViewPart.orientation"; 
    private static final String DIALOGSTORE_CALL_MODE = "CallHierarchyViewPart.call_mode"; 
    private static final String DIALOGSTORE_JAVA_LABEL_FORMAT = "CallHierarchyViewPart.java_label_format"; 
    private static final String TAG_ORIENTATION = "orientation"; 
    private static final String TAG_CALL_MODE = "call_mode"; 
    private static final String TAG_JAVA_LABEL_FORMAT = "java_label_format"; 
    private static final String TAG_RATIO = "ratio"; 
    static final int VIEW_ORIENTATION_VERTICAL = 0;
    static final int VIEW_ORIENTATION_HORIZONTAL = 1;
    static final int VIEW_ORIENTATION_SINGLE = 2;
    static final int CALL_MODE_CALLERS = 0;
    static final int CALL_MODE_CALLEES = 1;
    static final int JAVA_LABEL_FORMAT_DEFAULT = JavaElementLabelProvider.SHOW_DEFAULT;
    static final int JAVA_LABEL_FORMAT_SHORT = JavaElementLabelProvider.SHOW_BASICS;