fix: allow edit of trace search fields

Signed-off-by: Patrik Cyvoct <patrik@ptrk.io>

Author: Sh4d1

src/components/QueryEditor/MetricAggregationsEditor/SettingsEditor/TraceSearchSettingsEditor.tsx

@@ -67,6 +67,7 @@ export const TraceSearchSettingsEditor = ({ metric }: Props) => {
       <InlineField label="Service name" labelWidth={16}>
         <SegmentAsync
           allowCustomValue={true}
+          allowEmptyValue={true}
           className={segmentStyles}
           loadOptions={loadFieldValues('service_name')}
           onChange={(e) => changeSetting('serviceName', e.value)}
@@ -77,6 +78,7 @@ export const TraceSearchSettingsEditor = ({ metric }: Props) => {
       <InlineField label="Span name" labelWidth={16}>
         <SegmentAsync
           allowCustomValue={true}
+          allowEmptyValue={true}
           className={segmentStyles}
           loadOptions={loadFieldValues('span_name')}
           onChange={(e) => changeSetting('spanName', e.value)}