revert loading indicator to blue

Author: marcgurney

scout-style/index.less

@@ -86,7 +86,7 @@ html, body{
     width: 100%;
     height: 100%;
     border-radius: 50%;
-    background-color: @green2;
+    background-color: @mc-blue0;
     opacity: 0.6;
     position: absolute;
     top: 0;