Dialog: Use .height(0) instead of .hide(0) when determining the size of the non-content area of a dialog.
Dialog: Use .height(0) instead of .hide(0) when determining the size of the non-content area of a dialog.

Partial fix for #5392 - Dialog explicit height doesn't match given value from set option.
GrayYoung/jQuery.UI.Extension,GrayYoung/jQuery.UI.Extension