Move custom transform orientations to workspace

This commit moves the list of transform orientations from scenes to workspaces.
Main reasons for this are:
* Transform orientations are UI data and should not be stored in the scene.
* Introducion of workspaces caused some (expected) glitches with transform orientations. Mainly when removing one.
* Improves code.

More technically speaking, this commit does:
* Move list of custom transform orientations from Scene to WorkSpace struct.
* Store active transform orientation index separate from View3D.twmode (twmode can only be set to preprocessor defined values now).
* Display custom transform orientation name in header when transforming in it (used to show "global" which isn't really correct).

1 files changed, 2 insertions, 1 deletions

diff --git a/source/blender/editors/include/ED_transform.h b/source/blender/editors/include/ED_transform.h
index 376ae8ca567..a20d2925564 100644
--- a/source/blender/editors/include/ED_transform.h
+++ b/source/blender/editors/include/ED_transform.h
@@ -43,6 +43,7 @@ struct wmEvent;
 struct wmKeyConfig;
 struct wmKeyMap;
 struct wmOperatorType;
+struct WorkSpace;
 struct Main;
 struct SnapObjectContext;
 struct SnapObjectParams;
@@ -130,7 +131,7 @@ void BIF_createTransformOrientation(struct bContext *C, struct ReportList *repor
                                     const char *name, const bool use_view,
                                     const bool activate, const bool overwrite);
 void BIF_selectTransformOrientation(struct bContext *C, struct TransformOrientation *ts);
-void BIF_selectTransformOrientationValue(struct bContext *C, int orientation);
+void BIF_selectTransformOrientationValue(struct View3D *v3d, int orientation);
 
 void ED_getTransformOrientationMatrix(const struct bContext *C, float orientation_mat[3][3], const short around);