update: improved initial state

improved the initial state of the list when no item is selected
the list will now cover a bigger portion of the screen on mobile before selecting an entry

app.py

@@ -603,7 +603,10 @@ body {
     }
     #top-panel {
         flex-direction: column;
-        height: 50vh;
+        height: auto;
+        flex-shrink: 1;
+        flex-grow: 1;
+        min-height: 50vh;
     }
     #video-list-column, #video-column {
         width: 100%;