index: set rooms

Without setting rooms in the case statement (room-105 for example) the following
queries would not show the speaker in the room (intended) but instead show the
entire schedule as if it were the RPi sign clients when room-105 was missing
in the case:

http://localhost/?room=room-105&year=2024&month=3&day=16&hour=11&minute=30

server/index.php

@@ -62,26 +62,21 @@
   } else {
       if (!empty($_GET["room"])) {
         switch ($_GET["room"]) {
-            case 'ballroom-de':
             case 'ballroom-a':
             case 'ballroom-b':
             case 'ballroom-c':
+            case 'ballroom-de':
             case 'ballroom-f':
             case 'ballroom-g':
             case 'ballroom-h':
-            case 'ballroom-gh':
-            case 'ballroom-i':
-            case 'ballroom-j':
             case 'room-101':
             case 'room-103':
-            case 'room-104':
+            case 'room-105':
             case 'room-106':
             case 'room-107':
+            case 'room-209':
             case 'room-211':
             case 'room-212':
-            case 'room-209':
-            case 'room-205':
-            case 'room-215':
                 $year = $month = $day = $hour = $minute = '';
                 if (!empty($_GET["year"])) {
                     $year = $_GET['year'];