dialog content shifts when dialog resized from top or left

[rdworth]

From ​http://forum.jquery.com/topic/dialog-resize-problem-in-ui-versions-1-8-rc2-3-on-ie-6-7-and-ff-3-6

This can be seen in the default dialog visual test:

​http://jquery-ui.googlecode.com/svn/tags/1.8rc3/tests/visual/dialog/default.html

If you resize by the left or top handles the content shifts in the same direction as the resize during the resize and stays there when done.

[rdworth]

Added resizable visual test to demonstrate source of issue ​http://jquery-ui.googlecode.com/svn/trunk/tests/visual/resizable/resizable_option_alsoResize_child.html

[rdworth]

Regression introduced in r3132 which fixed #2848

[Scott González]

Fixed in r3912.