Improve stdcm CI search performances

[axrolld]

Who would benefit from this feature?

End users

What is this feature about?

Searching for an operationnal point in STDCM can be rather slow and unpleasant depending on the network speed.

It would be very nice to load the results faster. Maybe store the possibilities locally or something ?

Why is this feature valuable?

This feature matters because this input is types by the user, which is a pretty quick action. Typing a letter takes a few ms so for this kind of component (the ocmbo box), the speed of the response is a very important criteria.

Anything else people should know?

... has to be taken into account