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
} else {
					currentPage.setSize(containerSize);
				}
			} else if (hdiff < 0 || vdiff < 0) {
				currentPage.setSize(containerSize);
			}
		}
		 
		
		
		Control[] children = pageContainer.getChildren();
		Control currentControl = currentPage.getControl();
		for (int i = 0; i < children.length; i++) {
			if (children[i] != currentControl)
				children[i].setVisible(false);
		}
		
		currentPage.setVisible(true);
		if (oldPage != null)
			oldPage.setVisible(false);
		
		update();
		return true;
	}
	/**
	 * Shows the "Page Flipping abort" dialog.
	 */
	void showPageFlippingAbortDialog() {
		MessageDialog.openError(getShell(), JFaceResources.getString("AbortPageFlippingDialog.title"), 
		JFaceResources.getString("AbortPageFlippingDialog.message"));