fdo#65295 - fix gradient focus issue

There was a wrong 'if' statement, that checked if the focus was over 75%
and also if the angle was less than 180. If so - it compensated for that
by adding 180 degrees to the angle (and losing the 'focus' attribute).
But it should do that even if the angle is more than 180 degrees, so
this was fixed.

Reviewed on:
	https://gerrit.libreoffice.org/6647

Change-Id: Ib2dc8a61359e656721c5c6c99587d4d547eed835