Timeout sound mute button

**Is your feature request related to a problem? Please describe.**
During the finals, there are timeouts for the teams to prepare for their next match. Usually between the last semi-final match and the first final match, we are performing the awards ceremony. During the ceremony the "30 Seconds Warning Horn" and the "End Time Buzzer" are enabled and interrupting the ceremony.

**Describe the solution you'd like**
We would like to have the option to mute / unmute those specific sounds or even all the sounds. In the Match Control Page, in the Settings tab or the Video Switch tab. With some indicator for the scorekeeper at the top of the page that indicates rather the sounds are enabled or disabled.

**Describe alternatives you've considered**
We tried to mute the displays one by one from the Video Switch tab, but this solution is inconvenient to the scorekeeper.
We also tried to mute the speakers externally but we don't want to count on it because we could forget to turn them back on.