Feedback while loading

public/js/mc.js

@@ -161,7 +161,9 @@ function fastLoad(_href, _history = true, _useCache = true) {
             console.warn('Target page not found: ' + _href);
             window.location.href = _href; // fallback
         }
+        hideMask();
     }
+    showMask();
     if(_useCache && !!fastCache[_href]) {
         onData(fastCache[_href]);
     }