Fixed "popping" and some tunneling issues with moving colliders

Calculate normals from collision triangles using the closest point

Calculate epsilon values for interp_weights_poly to improve accuracy

interp_weights_poly_v2 would have too large epsilon values for small
polygons. To solve this we now calculate the appropriate epsilon value
so it can gracefully handle big and small values.

To make sure there was no regression, these changes were tested with the
files in T36105, T31581. Also with a surface deform modifier test file
attached in the differential below.

Reviewed By: Brecht

Differential Revision: http://developer.blender.org/D7772

Merge branch 'blender-v2.83-release'

Fix T74577: world_to_camera_view broken for off-axis projection

The issue was that the projection would be inverted.
So if you shifted 0.1 along the y axis, world_to_camera_view would act
as if you had shited it -0.1 along the y axis.

Fix T76541: OpenGl Depth Picking not selecting frontmost object

The issue was that we used GL_ALWAYS for depth checking here which would
lead to the depth information from objects being messed up.

It would not represent which object was closest to the camera.

Reviewed By: Clément Foucault, Jeroen Bakker, Campbell Barton

Differential Revision: http://developer.blender.org/D7710

Fix T76717: Set Rotation Mode Incorrectly Recalculates Bone Rotation In Pose Mode

The issue was that we didn't convert the current rotational values.
We simply just switched mode without doing any data conversions.

Fix Frame Dropping not dropping the correct amount of frames

Previously the playback mode "Frame Dropping" would not drop the correct
number of frames which would lead to slow playback.

For example, the playback target is 60fps. However we can only muster
around 32 fps.

The delta frames from the last step is in this case ~1.98 or so.

With the previous code, we would floor this. That would lead us to step
forward one frame each time, effectively playing back the animation at
half the speed as we will try to render every frame.

To fix this we simply save the remaining fraction from the previous
frame and use it to compute the current frame step.

Reviewed By: Sybren

Differential Revision: http://developer.blender.org/D7694

Made pose push/relax to breakdown behave smooth on rotations

A follow up to T67212. I missed that the rotation interpolation had its
own code path.

The previous rotation push code was actually wrong (but smooth).

Now all of the actions behave correctly and is smoothly interpolated.

Fix T62422: Baking ray distance do not work

The previous naming scheme for the "selected to active" baking options
lead to confusion and they were not describing what they actually did.

To remedy this, I've added a new settings that does what the older setting implied it did.

Reviewed By: Brecht, Dalai, Andy Davies

Differential Revision: http://developer.blender.org/D7733