Add an enhancement for a minimal ui. (#102)

This removes the button backgrounds, hides the hearts when they are full and the magic when its not in use. It also hides the rupee / key counters. All this is still visible on the pause screen or when the minimap is visible. It also changes the minimap behavior to be hidden by default on a zone change.

soh/src/code/z_construct.c

@@ -462,7 +462,7 @@ void func_80111070(void) {
     WREG(28) = 0;
     R_OW_MINIMAP_X = 238;
     R_OW_MINIMAP_Y = 164;
-    R_MINIMAP_DISABLED = false;
+    R_MINIMAP_DISABLED = CVar_GetS32("gMinimalUI", 0);
     WREG(32) = 122;
     WREG(33) = 60;
     WREG(35) = 0;