Fix ansi escape sequences with both reset and color parameters

Fix ansi escape sequences with both reset and color parameters

The initial 0 "reset/normal" was setting attr = ANSI_OFF, which was
subsequently being or'ed with ANSI_COLOR.

The color resolution was then checking for the ANSI_OFF bit and
turning all coloring off, even though ANSI_COLOR was also set.

Change the color resolution to check for "attr == ANSI_OFF" instead, so
the color isn't reset unless the reset occurs last in the sequence.

(closes #3689)