Flowbite re-initialises popovers on every htmx swap. A popover hidden via
Tailwind `invisible` (visibility:hidden) still occupies layout, so once
Popper parks it with a transform offset it expands the table's
overflow-x-auto wrapper and a spurious scrollbar appears (horizontal here,
vertical in #40). Add `[&.invisible]:hidden` so the popover is removed from
layout while hidden; Flowbite drops `invisible` on show, restoring display.
Relates to #40. e2e regression covers no-overflow-after-swap plus
popover-still-shows-on-hover.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
lukas
