Blender Git Loki

Fix T83092: Direction of rotation with View orientation changed in 2.91

The change was intentional so that the orientation matrices match
(`rv3d->viewinv` becomes equal to the orientation matrix).

But, although in a projection matrix the Z axis is negative, this
should not be so from the user's point of view.

So the solution here is to negate the Z axis when the View orientation
is chosen.

This affects all modes, but is only evident for rotation.

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Another change here is to use the final rotation value (`values_final`)
for the gizmo drawing since this value can be changed by the mode.