Improve performance of new events updates checker

[bonny]

Currently the events-update-checker runs every 5 seconds. This is indeed very often, as reported by users. Before the React rewrite is was not as often, so maybe this is a leftover from when I was actively developing the React version and did not want to wait so long for each update 🤔 .

Some ideas:

• Increase the default from the very low 5 seconds to something more reasonable like 30 seconds.
• Add options to select the interval, something like "Disable, 15 seconds, 30 seconds, every minute, every 5 minutes, ..."
• Detect if browser tab with log is in background and disable or throttle the check then

Reported here for example here:

• https://wordpress.org/support/topic/excessively-frequent-query-for-updates/

[bonny]

The interval is updated to 30 seconds now.

Still thinking about the other options.

[fvdm]

An interval selection on the main view would be nice. When doing maintenance on the site or server I like to see exactly what people are doing. So then a short interval is preferred.

Maybe default to 30 seconds and add a 'live mode' toggle that will enforce the 5 sec interval?

One of my phone apps (Bluetooth Inspector) has the below 3-step button: pause-scan-intensive. In Simple History it could be pause - play (30s) - fast (5s).