Enable smooth panning between past/live.

src/scss/card.scss

@@ -37,8 +37,7 @@ div.main {
   width: 100%;
   height: 100%;
   margin: auto;
-  display: flex;
-  justify-content: center;
+  display: block;
 
   // Necessary to get Safari to show border-radius correctly.
   transform: translateZ(0);
@@ -118,11 +117,6 @@ ha-card.triggered {
   animation: warning-pulse 5s infinite;
 }
 
-frigate-card-live.hidden {
-  // Live view will be rendered but hidden for live preloading.
-  display: none;
-}
-
 /************
  * Fullscreen
  *************/
@@ -188,4 +182,4 @@ web-dialog::part(dialog) {
   // Fixes to render the dialog correctly in Safari.
   border-radius: 0px;
   background: transparent;
-}
+}