- made option for auto open toolbox on left/mouse hold.

standard starts with 0.5 sec. Turn the threshold value up to effectively
  disable it when you dislike it. But give it a try!
- added 'Home' after splitting window for buttonswindow

source/blender/blenkernel/intern/blender.c

@@ -272,6 +272,10 @@ static void setup_app_data(BlendFileData *bfd, char *filename) {
 			U.menuthreshold1= 5;
 			U.menuthreshold2= 2;
 		}
+		if(U.tb_leftmouse==0) {
+			U.tb_leftmouse= 5;
+			U.tb_rightmouse= 5;
+		}
 	}
 	
 	R.winpos= bfd->winpos;

source/blender/makesdna/DNA_userdef_types.h

@@ -140,7 +140,8 @@ typedef struct UserDef {
 	short menuthreshold1, menuthreshold2;
 	char fontname[64];
 	struct ListBase themes;
-	short undosteps, pad0[3];
+	short undosteps, pad0;
+	short tb_leftmouse, tb_rightmouse;
 	struct SolidLight light[3];
 } UserDef;
 

source/blender/src/editobject.c

@@ -5507,7 +5507,7 @@ void std_rmouse_transform(void (*xf_func)(int))
 		else {
 			PIL_sleep_ms(10);
 			timer++;
-			if(timer>=10*U.menuthreshold1) {
+			if(timer>=10*U.tb_rightmouse) {
 				toolbox_n();
 				return;
 			}

source/blender/src/editscreen.c

@@ -2225,7 +2225,7 @@ static short testsplitpoint(ScrArea *sa, char dir, float fac)
 static void splitarea(ScrArea *sa, char dir, float fac)
 {
 	bScreen *sc;
-	ScrArea *newa;
+	ScrArea *newa=NULL;
 	ScrVert *sv1, *sv2;
 	short split;
 	
@@ -2280,6 +2280,11 @@ static void splitarea(ScrArea *sa, char dir, float fac)
 		sa->v2= sv2;
 	}
 	
+	if(sa->spacetype==SPACE_BUTS) {
+		addqueue(sa->win, UI_BUT_EVENT, B_BUTSHOME);
+		addqueue(newa->win, UI_BUT_EVENT, B_BUTSHOME);
+	}
+	
 	/* remove double vertices en edges */
 	removedouble_scrverts();
 	removedouble_scredges();

source/blender/src/editview.c

@@ -252,7 +252,7 @@ int gesture(void)
 			/* not drawing yet... check for toolbox */
 			PIL_sleep_ms(10);
 			timer++;
-			if(timer>=10*U.menuthreshold1) {
+			if(timer>=10*U.tb_leftmouse) {
 				toolbox_n();
 				return 1;
 			}

source/blender/src/space.c

@@ -2003,6 +2003,37 @@ void drawinfospace(ScrArea *sa, void *spacedata)
 			"Time in 1/10 seconds for auto open sublevels");
 
 
+		uiDefBut(block, LABEL,0,"Toolbox Thresh.:",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)),y3label,medprefbut,buth,
+			0, 0, 0, 0, 0, "");
+
+		uiDefButS(block, NUM, 0, "LMB:",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)),y2,smallprefbut,buth,
+			&(U.tb_leftmouse), 2, 40, 0, 0,
+			"Time in 1/10 seconds leftmouse hold to open toolbox");
+
+		uiDefButS(block, NUM, 0, "RMB:",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)),y1,smallprefbut,buth,
+			&(U.tb_rightmouse), 2, 40, 0, 0,
+			"Time in 1/10 seconds for rightmouse to open toolbox");
+
+			
+		uiDefBut(block, LABEL,0,"View rotation:",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)+smallprefbut+2),y3label,medprefbut,buth,
+			0, 0, 0, 0, 0, "");
+
+		uiDefButS(block, TOG|BIT|5, B_DRAWINFO, "Trackball",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)+smallprefbut+2),y2,(smallprefbut+2),buth,
+			&(U.flag), 0, 0, 0, 0,
+			"Use trackball style rotation with middle mouse button");
+
+		uiDefButS(block, TOGN|BIT|5, B_DRAWINFO, "Turntable",
+			(xpos+edgespace+(3*midspace)+(3*medprefbut)+smallprefbut+2),y1,(smallprefbut+2),buth,
+			&(U.flag), 0, 0, 0, 0,
+			"Use turntable style rotation with middle mouse button");
+
+
+
 		uiDefButS(block, TOGN|BIT|10, B_DRAWINFO, "Rotate View",
 			(xpos+edgespace+(4*midspace)+(4*medprefbut)),y2,(smallprefbut+2),buth,
 			&(U.flag), 0, 0, 0, 0, "Default action for the middle mouse button");
@@ -2021,19 +2052,6 @@ void drawinfospace(ScrArea *sa, void *spacedata)
 
 
 
-		uiDefBut(block, LABEL,0,"View rotation method:",
-			(xpos+edgespace+(3*midspace)+(3*medprefbut)),y3label,medprefbut,buth,
-			0, 0, 0, 0, 0, "");
-
-		uiDefButS(block, TOG|BIT|5, B_DRAWINFO, "Trackball",
-			(xpos+edgespace+(3*midspace)+(3*medprefbut)),y2,(smallprefbut+2),buth,
-			&(U.flag), 0, 0, 0, 0,
-			"Use trackball style rotation with middle mouse button");
-
-		uiDefButS(block, TOGN|BIT|5, B_DRAWINFO, "Turntable",
-			(xpos+edgespace+(3*midspace)+(3*medprefbut)+smallprefbut+2),y2,(smallprefbut+2),buth,
-			&(U.flag), 0, 0, 0, 0,
-			"Use turntable style rotation with middle mouse button");
 
 		uiDefBut(block, LABEL,0,"Mousewheel:",
 			(xpos+edgespace+(4*midspace)+(5*medprefbut)),y3label,medprefbut,buth,