Improve auth and download UI states

static/css/app.src.css

@@ -119,6 +119,10 @@
     opacity: .7;
   }
 
+  .ui-btn[aria-busy="true"] {
+    pointer-events: none;
+  }
+
   .ui-btn-primary:disabled {
     background: #cbd5e1;
   }
@@ -175,6 +179,11 @@
     border-top-color: #fff;
     animation: spin .75s linear infinite;
   }
+
+  .ui-btn-secondary .spinner {
+    border-color: rgba(0, 94, 184, .22);
+    border-top-color: #005EB8;
+  }
 }
 
 @keyframes spin {