Update countdown and current recorded time to title of the browser tab in realtime

[ameytessact]

When I start recording another tab, I'm not sure when exactly the recording starts and how long it has been. One way to indicate this could be through the title displayed in the browser tab.

[some9000]

A countdown would be great to have a moment to hide the "gifcapdev is sharing your screen" message. Other than that - awesome tool, huge thanks for making it.