To be honest, you might as well just go down the list and disable them one by one.
There's no global switch because a lot of rebuilding needs to happen for the changes to take effect.
There's a bit of a "hack" way of doing it.
While you're on the list of Template Modifications, open up your Browser Dev Tools (usually F12) and go to the Console tab.
You should be able to enter in some custom code. Paste this in and hit enter:
Code:
$('.Toggler').attr('checked', false).closest('form').submit();