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

5 files changed, 9 insertions, 13 deletions

diff --git a/source/blender/editors/include/ED_particle.h b/source/blender/editors/include/ED_particle.h
index 23997e06aef..f2973d0d070 100644
--- a/source/blender/editors/include/ED_particle.h
+++ b/source/blender/editors/include/ED_particle.h
@@ -71,8 +71,9 @@ void PE_undo_push(struct Scene *scene, const char *str);
 void PE_undo_step(struct Scene *scene, int step);
 void PE_undo(struct Scene *scene);
 void PE_redo(struct Scene *scene);
-void PE_undo_menu(struct Scene *scene, struct Object *ob);
 int PE_undo_valid(struct Scene *scene);
+void PE_undo_number(struct Scene *scene, int nr);
+char *PE_undo_get_name(struct Scene *scene, int nr, int *active);
 
 #endif /* ED_PARTICLE_H */
 
diff --git a/source/blender/editors/include/ED_screen.h b/source/blender/editors/include/ED_screen.h
index 93ce82fa483..6e396a1021b 100644
--- a/source/blender/editors/include/ED_screen.h
+++ b/source/blender/editors/include/ED_screen.h
@@ -90,6 +90,7 @@ void	ED_area_headerprint(ScrArea *sa, const char *str);
 void	ED_area_newspace(struct bContext *C, ScrArea *sa, int type);
 void	ED_area_prevspace(struct bContext *C, ScrArea *sa);
 void	ED_area_swapspace(struct bContext *C, ScrArea *sa1, ScrArea *sa2);
+int		ED_area_headersize(void);
 
 /* screens */
 void	ED_screens_initialize(struct wmWindowManager *wm);
diff --git a/source/blender/editors/include/ED_types.h b/source/blender/editors/include/ED_types.h
index 0218b8d9c2d..c1c31372011 100644
--- a/source/blender/editors/include/ED_types.h
+++ b/source/blender/editors/include/ED_types.h
@@ -40,10 +40,6 @@
 #define SELECT	 1
 #define ACTIVE	 2
 
-/* buttons */
-#define XIC 20
-#define YIC 20
-
 /* proposal = put scene pointers on function calls? */
 // #define BASACT                    (scene->basact)
 // #define OBACT                     (BASACT? BASACT->object: NULL)
diff --git a/source/blender/editors/include/ED_util.h b/source/blender/editors/include/ED_util.h
index 50dd2308b6b..5e004fd8d47 100644
--- a/source/blender/editors/include/ED_util.h
+++ b/source/blender/editors/include/ED_util.h
@@ -59,6 +59,7 @@ void	ED_undo_redo			(struct bContext *C);
 void	ED_OT_undo				(struct wmOperatorType *ot);
 void	ED_OT_undo_push			(struct wmOperatorType *ot);
 void	ED_OT_redo				(struct wmOperatorType *ot);
+void	ED_OT_undo_history		(struct wmOperatorType *ot);
 
 int		ED_undo_operator_repeat(struct bContext *C, struct wmOperator *op);
 	/* convenience since UI callbacks use this mostly*/
@@ -76,11 +77,7 @@ void undo_editmode_push(struct bContext *C, const char *name,
 						int (*validate_undo)(void *, void *));
 
 						
-void	*undo_editmode_get_prev		(struct Object *ob);
-struct uiBlock *editmode_undohistorymenu(struct bContext *C, struct ARegion *ar, void *arg_unused);
-void	undo_editmode_menu			(struct bContext *C);
 void	undo_editmode_clear			(void);
-void	undo_editmode_step			(struct bContext *C, int step);
 
 /* crazyspace.c */
 float *crazyspace_get_mapped_editverts(struct Scene *scene, struct Object *obedit);
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index d6988aa9618..1a26079800c 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -35,6 +35,7 @@
 #define UI_INTERFACE_H
 
 #include "RNA_types.h"
+#include "DNA_userdef_types.h"
 
 /* Struct Declarations */
 
@@ -100,8 +101,8 @@ typedef struct uiLayout uiLayout;
 #define UI_BLOCK_RET_1			4		/* XXX 2.5 not implemented */
 #define UI_BLOCK_NUMSELECT		8
 /*#define UI_BLOCK_ENTER_OK		16*/ /*UNUSED*/
-/*#define UI_BLOCK_NOSHADOW		32*/ /*UNUSED*/
-/*#define UI_BLOCK_UNUSED			64*/ /*UNUSED*/
+#define UI_BLOCK_CLIPBOTTOM		32
+#define UI_BLOCK_CLIPTOP		64
 #define UI_BLOCK_MOVEMOUSE_QUIT	128
 #define UI_BLOCK_KEEP_OPEN		256
 #define UI_BLOCK_POPUP			512
@@ -622,8 +623,8 @@ void UI_exit(void);
 #define UI_LAYOUT_MENU			2
 #define UI_LAYOUT_TOOLBAR		3
  
-#define UI_UNIT_X				20
-#define UI_UNIT_Y				20
+#define UI_UNIT_X				U.widget_unit
+#define UI_UNIT_Y				U.widget_unit
 
 #define UI_LAYOUT_ALIGN_EXPAND	0
 #define UI_LAYOUT_ALIGN_LEFT	1