- got rid of silly #define ..._BIT, #define ... (1<<..._BIT) stuff

- switched almost all uiDefBut(..., TOG|BIT|..) to use UiDefButBit and the
   name of the actual bit define instead of just a magic constant, this makes
   searching the code much nicer. most of the credit here goes to LetterRip
   who did almost all of the conversions, I mostly just checked them over.

source/blender/src/header_script.c

@@ -230,11 +230,11 @@ void script_buttons(void)
 
 	uiBlockSetEmboss(block, UI_EMBOSSN);
 	if(curarea->flag & HEADER_NO_PULLDOWN) {
-		uiDefIconButS(block, TOG|BIT|0, B_FLIPINFOMENU, ICON_DISCLOSURE_TRI_RIGHT,
+		uiDefIconButBitS(block, TOG, HEADER_NO_PULLDOWN, B_FLIPINFOMENU, ICON_DISCLOSURE_TRI_RIGHT,
 				xco,2,XIC,YIC-2,
 				&(curarea->flag), 0, 0, 0, 0, "Enables display of pulldown menus");
 	} else {
-		uiDefIconButS(block, TOG|BIT|0, B_FLIPINFOMENU, ICON_DISCLOSURE_TRI_DOWN,
+		uiDefIconButBitS(block, TOG, HEADER_NO_PULLDOWN, B_FLIPINFOMENU, ICON_DISCLOSURE_TRI_DOWN,
 				xco,2,XIC,YIC-2,
 				&(curarea->flag), 0, 0, 0, 0, "Hides pulldown menus");
 	}