UI: tweak 3D view space between navigation gizmo & buttons

Align the lower side of the navigation gizmo with the top of the icons.

source/blender/editors/space_view3d/view3d_gizmo_navigate.c

@@ -274,7 +274,7 @@ static void WIDGETGROUP_navigate_draw_prepare(const bContext *C, wmGizmoGroup *g
   float icon_offset_from_axis = 0.0f;
   switch ((eUserpref_MiniAxisType)U.mini_axis_type) {
     case USER_MINI_AXIS_TYPE_GIZMO:
-      icon_offset_from_axis = icon_offset * 2.0f;
+      icon_offset_from_axis = icon_offset * 2.1f;
       break;
     case USER_MINI_AXIS_TYPE_MINIMAL:
       icon_offset_from_axis = (UI_UNIT_X * 2.5) + ((U.rvisize * U.pixelsize * 2.0f));