Nojs info: fix invisible uptime counter taking up space

Also adds "visibility: hidden;" to `disappear`. It would replace
"opacity: 0;" but Firefox acts weird with only visibility set, it only
half works until you switch between desktop and mobile view. IDK this
isn't that important.

anonstream/templates/nojs_info.html

@@ -75,13 +75,13 @@
         animation: appear step-end both;
       }
       #m1 {
-        animation-duration: {{ 600 - uptime }}s;
+        animation-delay: {{ 600 - uptime }}s;
       }
       #h0 {
-        animation-duration: {{ 3600 - uptime }}s;
+        animation-delay: {{ 3600 - uptime }}s;
       }
       #h1 {
-        animation-duration: {{ 36000 - uptime }}s;
+        animation-delay: {{ 36000 - uptime }}s;
       }
       #uptime-dynamic {
         animation: disappear step-end {{ 360000 - uptime }}s forwards;
@@ -95,12 +95,15 @@
       @keyframes appear {
         from {
           width: 0;
+          height: 0;
           visibility: hidden;
         }
       }
       @keyframes disappear {
         to {
+          width: 0;
           height: 0;
+          visibility: hidden;
           opacity: 0;
         }
       }