Fixes the wait, delay, and error screens not showing on mobile devices.

issue #1402

resources/static/dialog/css/popup.css

@@ -94,18 +94,21 @@ section > .contents {
 }
 
 .waiting #wait {
+    display: block;
     z-index: 1;
     -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
     opacity: 1;
 }
 
 .delay #delay {
+    display: block;
     z-index: 2;
     -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
     opacity: 1;
 }
 
 .error #error, #error.unsupported, #error.cookies_disabled {
+    display: block;
     z-index: 3;
     -ms-filter:"progid:DXImageTransform.Microsoft.Alpha(Opacity=100)";
     opacity: 1;
@@ -422,4 +425,4 @@ a.emphasize {
   line-height: 1.3em;
   margin-top: 2em;
   margin-bottom: 2em;
-}
\ No newline at end of file
+}