Code holiday commit:

- fix: user pref, window title was reset to 'Blender' on tab usage

- Undo history menu back:
  - name "Undo History"
  - hotkey alt+ctrl+z (alt+apple+z for mac)
  - works like 2.4x, only for global undo, editmode and particle edit.

- Menu scroll
  - for small windows or screens, popup menus now allow to display
    all items, using internal scrolling
  - works with a timer, scrolling 10 items per second when mouse 
    is over the top or bottom arrow
  - if menu is too big to display, it now draws to top or bottom, 
    based on largest available space.
  - also works for hotkey driven pop up menus.

- User pref "DPI" follows widget/layout size
  - widgets & headers now become bigger and smaller, to match 
    'dpi' font sizes. Works well to match UI to monitor size.
  - note that icons can get fuzzy, we need better mipmaps for it

1 files changed, 16 insertions, 1 deletions

diff --git a/source/blender/blenkernel/intern/blender.c b/source/blender/blenkernel/intern/blender.c
index b852629e49c..20b44b3b899 100644
--- a/source/blender/blenkernel/intern/blender.c
+++ b/source/blender/blenkernel/intern/blender.c
@@ -620,7 +620,7 @@ void BKE_reset_undo(void)
 /* based on index nr it does a restore */
 void BKE_undo_number(bContext *C, int nr)
 {
-	curundo= BLI_findlink(&undobase, nr - 1);
+	curundo= BLI_findlink(&undobase, nr);
 	BKE_undo_step(C, 0);
 }
 
@@ -646,6 +646,21 @@ int BKE_undo_valid(const char *name)
 	return undobase.last != undobase.first;
 }
 
+/* get name of undo item, return null if no item with this index */
+/* if active pointer, set it to 1 if true */
+char *BKE_undo_get_name(int nr, int *active)
+{
+	UndoElem *uel= BLI_findlink(&undobase, nr);
+	
+	if(active) *active= 0;
+	
+	if(uel) {
+		if(active && uel==curundo)
+			*active= 1;
+		return uel->name;
+	}
+	return NULL;
+}
 
 char *BKE_undo_menu_string(void)
 {