Show alert if not refreshed in over 30 minutes

[BenShelton]

Just start a timer on the Congregation and Schedule pages when loaded that after 30 minutes shows a small alert at the top of the screen, along the lines of Page has not been refreshed in over 30 mins, click here to refresh which does a simple fetch of the list/schedule information.

This is mainly to catch the case if the page was left open for a long time and come back to the next day for example. Simply refreshing every X minutes is gonna eat function calls up.

I was thinking this timer should reset after any API calls but returned API data tends to only affect a portion of what is visible. It shouldn't take anyone more than 30 minutes to accomplish what they need anyway.