Addresses regression from [10334] in Dialog by more properly getting the viewport minus the scrollbar with a combination of documentElement.clientHeight and body.clientHeight.  Fixes #4261.
Addresses regression from [10334] in Dialog by more properly getting the viewport minus the scrollbar with a combination of documentElement.clientHeight and body.clientHeight.  Fixes #4261.

Patch from Mark Hays (IBM, CCLA on file)

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@10345 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful