Added refresh interface to channel and FPGA status components

[milletf1]

The channel and FPGA status components should expose a function that makes them perform a status update. https://angular.io/guide/component-interaction#parent-calls-an-viewchild explains how to call a function in a child component from its parent.

[milletf1]

I have set the status updates to occur every minute. Let me know if I need to change this.