refactor(cxl-tabs-slider): hide scrollbars

[lkraav]

Feels like horizontal scrollbar doesn't make sense here: add visual noise, and arrows already indicate content overflow

Can we patch out scrollbar display?

[anoblet]

anoblet#14

[lkraav]

On further consideration, scrollbars should be displayed in case of horizontal overflow.

Next step: verify what the exact state of the current component UX is.

[anoblet]

Currently scrollbars are displayed on all instances of cxl-tab-slider where there are enough items to overflow.

There is a PR open to make this conditional on a [show-scrollbar] property (anoblet#14).

[lkraav]

Currently scrollbars are displayed on all instances of cxl-tab-slider where there are enough items to overflow.

Sounds great, probably nothing else needed.

Only thing I've noticed is that horizontal scroll could work with swipes / mouse drags. Not sure what needs to happen to get that behavior. Is it maybe built-in with Tabs and we've disabled it?