In the current code NTLMv2 is used when talking about second generation
NTLM crypto algorithms. Most other publiations call this NTLM2, and use
NTLMv2 to describe a different crypto handshake that can be used by
either NTLM1 or NTLM2 crypto.

Mono calls GdipMeasureString with a height so large that rounding and
converting it to an integer gives a negative result.

This fixes a regression introduced by 10f58c14.

This patch should fix the regression(s) caused by my recent button painting
patches. The problem was that DrawFrameControl() was modifying the rectangle,
and one of my patches stopped calling DrawFrameControl() in case of ODA_FOCUS
action, so drawing an entire button and only focus started to differ, which
was hidden by the custom clipping (that was removed by my last patch).