Fixed false new device notifications in Safari; Enhanced readability for top message.

Previously, Safari triggered ondevicechange falsely when the embedded recording client was opened in a window, leading to false green notifications on the device selector buttons. These misleading indicators suggested new device connections, causing confusion. This issue has been addressed, and the device selector notifications now accurately reflect only real device connection and disconnection events.

The font size for the top messages shown by the recording client has been increased for improved readability. The messages were shown on choppy connections.