[FEATURE] Local Timers within Displays

[texasdiaz]

USER STORY: I want displays to not depend on the server for all of its timekeeping. I want the displays to be able to run their own internal clocks, and merely be kept "synchronized" with the display. This way if a display drops off the WiFi momentarily the clock can keep running internally until it reconnects to the server; otherwise, the clock "skips" and "jumps" as it gets infrequent updates from the server.

CURRENT BEHAVIOR: If the computer gets dropped from the WiFi network, even "momentarily", the display will stop updating the time. Having a local clock keeping the time will prevent the clock from not updating.

WHAT THIS WILL NOT FIX: If the display computer does not have connection when the timer is started, the timer may not start correctly.