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, 7 insertions, 0 deletions

diff --git a/source/blender/makesdna/DNA_screen_types.h b/source/blender/makesdna/DNA_screen_types.h
index 2524bad7c0f..75ae1cdab95 100644
--- a/source/blender/makesdna/DNA_screen_types.h
+++ b/source/blender/makesdna/DNA_screen_types.h
@@ -193,6 +193,13 @@ typedef struct uiList {           /* some list UI data need to be saved in file
 	uiListDyn *dyn_data;
 } uiList;
 
+typedef struct TransformOrientation {
+	struct TransformOrientation *next, *prev;
+	char name[64];	/* MAX_NAME */
+	float mat[3][3];
+	int pad;
+} TransformOrientation;
+
 typedef struct uiPreview {           /* some preview UI data need to be saved in file */
 	struct uiPreview *next, *prev;