Select parent on move/copy and select current content node on content tree pickers.

This change is a huge time save for any editor with more then one or two levels of hierarch in his site.  What is does is quite simple.  Normal when using the Copy, Mode, or any Content Picker properties on a document the popup tree selector starts at the root of the site and asks the user to browser for the node they want.  In this patch the current content page being edited is pre-located and the tree expanded to show it.  This adds a very short delay before the user can use the tree picker but now if there are 3-4 levels of hierarchy the relevant section will already be located and selecting nodes adjacent or related to the current node is significantly faster.  Also the full tree is still there so it take no extra time if you want something completely different or unrelated to the current node.  (This does not affect media pickers because there is no correlation there to the current document)

![screen shot 2013-08-29 at 11 18 06 am](https://f.cloud.github.com/assets/458367/1050718/532c0c0c-10be-11e3-9e69-21c5c098d5e6.png)

![screen shot 2013-08-29 at 11 18 26 am](https://f.cloud.github.com/assets/458367/1050719/5677a88a-10be-11e3-91cf-5c3f313f4b1f.png)



Updated version of https://github.com/umbraco/Umbraco-CMS/pull/27