Should be able to use Local Changes for a copied/moved and modified file

[Quinn Taylor]

When I copy/move a file within my working copy, it shows with a green + icon, 
and doesn’t allow me to Show Local Changes for the file, but `svn diff` gives 
the correct result. 

When a file has history with the addition (which is the case for move and 
copy), it should be possible to view the changes with my configured diff tool.

   - Quinn

smime.p7s
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