Make battery estimate inaccessible in the "Full" state on default config

[OpenSauce04]

Fixes #2893

This PR makes it so that, when the battery module is in the Full state, the battery life estimate is inaccessible similarly to how the module acts in the Charging and Plugged states.

This is done by adding a line in the default config which sets a format for the Full state. Setting a format for a given state disables access to the format-alt display while that state is active.

There are possibly better ways to approach this than a config change, but I couldn't think of any that wouldn't limit the functionality of other configs that may use format-alt here for things other than displaying a battery estimate, in which case the issue wouldn't occur.

If there is a better solution to this problem, please let me know and I'll look into that instead.

[Alexays]

LGTM, thx