Menu item out of date on extension start

[fregante]

Since it only listen on tab changes, if the extension loads and the user doesn't change the tab, the menu item is not up to date.

This happens for example when the browser starts.

[fregante]

I think that browser startup is covered by the tab update listeners because the event is fired multiple times as the page loads:

https://github.com/fregante/webext-permission-toggle/blob/9f9e40cd8910f737fe8b924584b075e1f7a7a7fc/index.ts#L244-L248

So this only applies when all these are true:

• the extension was already installed beforehand
• the user already granted permissions to the host
• that host is the active tab (in any window)
• the extension was disabled and is now re-enabled
• the user goes to right-click on the action item and actually cares to read that menu item

Quite a long list of coincidences that basically only happen when testing the extension.

Not sure I care right this moment.