Bug 38462 [Dialogs] Tree in Preference & Properties dialog should be resizable
I20030604 On MacOS X the native tree isn't as compact as on other platforms. As a result some of the tree items in the Preference and Properties dialogs are barely visible. Since horizontalls scrolling is cumbersome, it would be nice to have a sash between the tree and the dialog's content. Remembering the dialog's size and the sash position would be helpful, too.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
messageLabel.addDisposeListener(new DisposeListener() {
			public void widgetDisposed(DisposeEvent event) {
				JFaceResources.getFontRegistry().removeListener(fontListener);
			}
		});
		JFaceResources.getFontRegistry().addListener(fontListener);
		GridData gd = new GridData(GridData.FILL_BOTH);
		messageLabel.setLayoutData(gd);
		
		titleImage = new Label(titleArea, SWT.LEFT);
		titleImage.setBackground(background);
		titleImage.setImage(JFaceResources.getImage(PREF_DLG_TITLE_IMG));
		gd = new GridData();
		gd.horizontalAlignment = GridData.END;
		titleImage.setLayoutData(gd);
		return titleArea;
	}
	/**
	 * @param parent the SWT parent for the tree area controls.
	 * @since 3.0
	 */
	protected void createTreeAreaContents(Composite parent) {
		
		treeViewer = createTreeViewer(parent);
		treeViewer.setLabelProvider(new PreferenceLabelProvider());
		treeViewer.setContentProvider(new PreferenceContentProvider());
		treeViewer.setInput(preferenceManager);
		layoutTreeAreaControl(treeViewer.getControl());
	}
	/**