Fix T88375: Bone Size Small After V3D.View_All

The wrong matrix function was used and overwrote the custom bone shape
scale instead of reading from it.

Reviewed By: sybren

Differential Revision: https://developer.blender.org/D11330

Fix T87160: DSE Keyframe Selection Now Selects Channels

Select All/Box/Circle/Lasso/MouseClick of keyframes now add channels to selection if any keydata was added to the selection.

Changed box/region select to sync channel selection instead of only ever adding channel to selection. Seems more intuitive

make tmp comments obvious (prefixed //)

Differential Revision: https://developer.blender.org/D11317

Fix T87160: DSE Keyframe Selection Now Selects Channels

Select All/Box/Circle/Lasso/MouseClick of keyframes now add channels to selection if any keydata was added to the selection.

NLA: Extract ..get_inverted_upper_snapshot()

Extracts `nlasnapshot_blend_get_inverted_upper_snapshot()` from
`BKE_animsys_nla_remap_keyframe_values()`

This introduces a new struct member:
`NlaEvalChannelSnapshot->remap_domain` and marks which values of
`blended_snapshot` are processed for remapping/used-for-inverting.
Effectively, it marks which values have successfully been remapped and
can be further used for remapping.

`nlasnapshot_blend_get_inverted_upper_snapshot()`:
output snapshot `r_upper_snapshot` has each channel's `remap_domain`
written to which effectively marks the successfully remapped values.
The only reason a value is not in the remap domain is if inversion
failed or it wasn't marked to be remapped.

`..get_inverted_upper_snapshot()` has a variant `nlasnapshot_blend()`
from {D10220}, but this patch doesn't depend on it at all. A third
variant will later be added `..get_inverted_lower_snapshot()`.
Altogether, these three functions allow solving for any of
(lower_snapshot, upper_snapshot, blended_snapshot) given the other two.
The function `..get_inverted_lower_snapshot()` will also similarly
process the remap domain of the blended and lower snapshot.

added assertions within `nlasnapshot_blend()` and
`..get_inverted_upper_snapshot()` to future proof branches dealing with
blendmode and mixmodes. (suggested by sybren)

No user functional changes

Reviewed By: sybren

Differential Revision: https://developer.blender.org/D10222

Graph Editor: FCurve Show Extrapolation Toggle

Adds toggle to graph editor (View->Show Extrapolation). When disabled,
then fcurves only draw over the keyframe range. For baked fcurves and
ghost fcurves, the range is all sampled points.

It is intended for frequent use so anybody could assign hotkey or add
to quick favorites that's why GE-View is the best place for it.

Show Extrapolation is the default.

Reviewed By: sybren, Stan1, looch

Differential Revision: http://developer.blender.org/D10442

manual patch

NLA: Keyframe Remap Through Upper Strips

Differential Revision: https://developer.blender.org/D10504

include D9925: NLA Tweak Mode: Evaluate Upper Stack

- ghost fcurve drawing uses Show Extrapolation setting

- Overlooked remap_domain writing, now sets remap_domain on output even when succeeds. This didn't have any effect for user as the input blended_snapshot and output upper_snapshot were always the same.