fix issue with many of the filter fileds and values #492
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Related issue: #357
Describe Your Changes
Replaced Select with Combobox — the new recommended component in Grafana UI, which has built-in virtualization.
Implemented async loading — Combobox supports an options function that returns a Promise<ComboboxOption[]>. Options are loaded when the dropdown opens and when text is entered.
Added debounced search — a 300ms delay during search to prevent request spamming.
Client-side caching and filtering:
All fields are loaded once on the first open
Subsequent searches filter the already loaded data locally
Display limit — 1000 options (MAX_VISIBLE_OPTIONS)
Checklist
The following checks are mandatory: