feat(lxl-web): Add keyboard shortcut help for expanding search

[johanbissemattsson]

Description

Solves

Add keyboard shortcut help for expanding search.

Summary of changes

• Add keyboard shortcut help for expanding search

[jesperengstrom]

Working as intended.
But I think we should maybe ask users about this too - to what extent it's helpful or comprehensible. Must be careful not to overload the search area.

• Novice users would need to hover this to understand what it's doing, somewhat contradictory if you want to use keyboard only?
• Pro users would just start typing the name of a filter they like to add, no need to simply expand the search?

But i'm totally fine with trying this out.

[olovy]

LGTM

I think the text should be e.g. "Gå till sökruta" or similar.
The point is selecting the search field without clicking, nor that it is expanded?