Animation: Pose sliding tools improvements

Improve the "In Betweens" tools:
- Push Pose from Rest Pose
- Relax Pose to Rest Pose
- Push Pose from Breakdown
- Relax Pose to Breakdown
- Pose Breakdowner

These all now use the same new sliding tool:
- Actual visual indication of the blending/pushing percentage applied.
- Mouse wrapping to allow for extrapolation without having to worry
  about the initial placement of the mouse. This also means these tools
  are actually usable when chosen from the menu.
- Precision mode by holding {key Shift}.
- Snapping to 10% increments by holding {key Ctrl}.
- Overshoot protection; by default the tool doesn't allow overshoot
  (lower than 0% or higher than 100%), and it can be enabled by pressing
  {key E}.
- Bones are hidden while sliding, so the pose itself can be seen more
  clearly. This can be toggled by pressing {key H} while using the tool.

Reviewed By: #animation_rigging, zeddb, sybren, #user_interface, brecht, Severin, looch

Maniphest Tasks: T81836

Differential Revision: https://developer.blender.org/D9054

1 files changed, 1 insertions, 0 deletions

diff --git a/source/blender/editors/armature/CMakeLists.txt b/source/blender/editors/armature/CMakeLists.txt
index 98c050950be..7266b1b88d7 100644
--- a/source/blender/editors/armature/CMakeLists.txt
+++ b/source/blender/editors/armature/CMakeLists.txt
@@ -19,6 +19,7 @@ set(INC
   ../include
   ../../blenkernel
   ../../blenlib
+  ../../blenfont
   ../../blentranslation
   ../../depsgraph
   ../../gpu