Remove border from subnav dropdowns

[bartaz]

Done

Removes border from subnav dropdowns

Fixes #2765

QA

• Pull code
• Run ./run
• Open http://0.0.0.0:8101/ or demo
• Check subnav examples (light and dark) if they look ok

Screenshots

[webteam-app]

Starting demo at: https://vanilla-framework-canonical-web-and-design-pr-2925.run.demo.haus/

[anthonydillon]

Nice 👍

[bartaz]

@lyubomir-popov You wanted to do any more small adjustments of is just removing borders for now fine?

[lyubomir-popov]

Thanks @bartaz I think this can go in as it is.

For a future revision, I'd prefer the drop shadow of submenus to be visible above the horizontal menu, just to create a bit of separation, but with the current markup this is not easily achieved. Something is clipping the box shadow and I couldn't figure out what. But let's leave that for when we do a more thorough update.

[bartaz]

@lyubomir-popov There was a clip property that was there specifically to hide this top part of shadow. Could be easily removed:

Of course, it's not really visible on dark nav.

[anthonydillon]

Good work, but personally I liked it better when it didn't have the drop shadows.

[lyubomir-popov]

@bartaz as agreed in the standup, please remove the clip. I've talked to @anthonydillon to explain the intricacies there and any bigger changes will be postponed for now as may involve small changes to a handful of related components.