3D View: move deselect all logic into an option

This removes `VIEW3D_OT_select_or_deselect_all`, adding a
deselect_all option to the `VIEW3D_OT_select` operator.

- Add utility functions to simplify de-selecting all.

- Return true from selection functions when they change the selection
  to avoid redundant updates.

- Use arrays of bases when passing objects between selection utility
  functions since some users require bases.

- Fix logical error in box selection that updated all objects after
  the first hit.

1 files changed, 4 insertions, 0 deletions

diff --git a/source/blender/editors/include/ED_mball.h b/source/blender/editors/include/ED_mball.h
index e1033866193..2683631e85f 100644
--- a/source/blender/editors/include/ED_mball.h
+++ b/source/blender/editors/include/ED_mball.h
@@ -24,6 +24,7 @@
 #ifndef __ED_MBALL_H__
 #define __ED_MBALL_H__
 
+struct Base;
 struct Object;
 struct UndoType;
 struct bContext;
@@ -37,6 +38,9 @@ struct MetaElem *ED_mball_add_primitive(struct bContext *C, struct Object *obedi
 
 bool ED_mball_select_pick(struct bContext *C, const int mval[2], bool extend, bool deselect, bool toggle);
 
+bool ED_mball_deselect_all_multi_ex(struct Base **bases, uint bases_len);
+bool ED_mball_deselect_all_multi(struct bContext *C);
+
 void ED_mball_editmball_free(struct Object *obedit);
 void ED_mball_editmball_make(struct Object *obedit);
 void ED_mball_editmball_load(struct Object *obedit);