CC-4816: Timezones should be a user preference

-done

install_minimal/include/AirtimeInstall.php

@@ -340,6 +340,11 @@ class AirtimeInstall
         if ($result < 1) {
             return false;
         }
+        $sql = "INSERT INTO cc_pref (subjid, keystr, valstr) VALUES (1, 'user_1_timezone', '$defaultTimezone')";
+        $result = $con->exec($sql);
+        if ($result < 1) {
+            return false;
+        }
         return true;
     }