Expose remote search option off el-ui selects

[carsoli]

element-ui supports remote search https://element.eleme.io/#/en-US/component/select#remote-search

Kotti needs to support accepting a remoteMethod, to be able to dynamically fetch options based on user query search

Internal Issues Blocked by This

• https://3yourmind.atlassian.net/browse/B3-7798

[FlorianWendelborn]

I think we should consider other solutions for this. The remote search feature that KtSelect had was one of the bigger reasons why it grew in complexity. We’d also ideally want a bit more UX around this than just the search itself.

My take on this:

1. Search query should be controlled
2. Search results should be passed via options still
3. There should be a separate loading state for "waiting for backend" interactions (also controlled)

IMO, we should consider having separate components for this, at least to some extend. Alternatives I can think of is exposing a bit more functionality from KtField*Select so that we can wrap it in a KtField*Search or something like that.

What I want to avoid is increased complexity in usage and implementation, especially given that we still have element UI hacks to worry about already

[carsoli]

Closed by the dedicated implementation of KtFieldSingleSelectRemote - we don't use element-ui anymore thanks to #565 and so it's closed for the multiselect