fix combobox reopen on click

[franklinlindemberg]

when we select an item in the combobox, if we click it again it is not opening (unless we click somewhere else on the screen first). This PR fixes that.

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Note

Low Risk
Single-line event binding change in combobox UI behavior with no backend or security impact.

Overview
Fixes gRPC service/method comboboxes so the suggestion list opens again when you click the field right after picking a value, without having to blur away first.

The combobox text input only ran autocomplete("search", …) on focus. After a selection the input often stays focused, so another click did not refire that handler. The same handler is now bound to focus and click, so a click always reopens the dropdown with the current value.

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[dragonsinth]

good catch