Large region selection clips hit 20008

[mttwc]

"The size of the request is too large."

https://msdn.microsoft.com/en-us/library/office/dn750990.aspx?f=255&MSPPError=-2147217396

To repro, do a big region clip

[mttwc]

Caveats of having a 4k monitor :P

[mttwc]

We need to add some patching logic for clips that involve a large number of regions as well (i.e., clipping all the regions at once causes 20008)