Bug 5989: Object viewer drag object tab cursor icon can be difficult to see
Bug Number: 5989
Release notes (y/n): Yes
For Release Nums: 7.1.2 and 7.2

When dragging an object tab from the Object Viewer -- or when dragging an 
Open Object Dialog's object icon into INTO the Object Viewer -- the cursor 
changes to a "medium" sized object icon.

This icon is now framed in an opaque white box with a single-pixel black
border.  This allows it to visually stand out against any workspace 
background.

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