'Needs Review' flag bug when saving

[Addy771]

After ticking the "needs review" flag box on an existing part and trying to save the changes, partkeepr hangs. Trying to view a part after this does not work correctly.

Steps to reproduce:

-Open demo.partkeepr.org
-Double click 'LM394' to view it
-Tick the needs review box
-Press save

Partkeepr should hang and the save button appears grayed out. After some time the button appears normal again.

-Close the LM394 view
-Double click 'LM394' to view it

The LM394 part opens incorrectly, at the bottom of the screen. See this screenshot: https://dl.dropboxusercontent.com/u/31512672/partkeepr_flag_issue.png

I experience this on my own partkeepr install running partkeepr-0.82, as well as the demo website. I am running Google Chrome Version 51.0.2704.84 m on Windows 7