[Form] Fix height ac-panel in ac-select

[eduardodusik]

Ac-panel is using height as the max-height set for ac-list, this resolves the panel bug not opening in internet explorer, but causes the height bug to always be the max-height of the list.

https://github.com/accera-tech/solar-components/blob/e9d1d5076ca93fe5bd23074bc1d7cc0dead9fb68/src/components/molecules/ac-select/ac-select.tsx#L559-L565