Prevent full-width menus from causing horizontal scroll

[kadamwhite]

100vw does not account for the size of the nav bar, whereas 100% will resolve against the relative positioning context

[kadamwhite]

Doubling up with a bugfix version bump to avoid needing subsequent review

[pamprn09]

I'm concerned what this might cause in non FSE sites:

Twenty Twenty-Five main	Twenty Twenty-Five branch

[kadamwhite]

n.b., twentytwentyfive is an FSE site, but not configured in the same way as our normal uses of this plugin.

Good feedback; it does change behavior, so would be dangerous to ship as a patch regardless. I'd argue the current handling is also wrong on twentytwentyfive because right: -1px on the menu doesn't align it with the right side of the screen, and the 100vw menu therefore goes off-screen to the left.

I would therefore expect this change to be non-impactful anywhere that the current styling displays correctly, but I'm fine making the fix on the level of the project where we use this, for now.