Dashboard: fix promql query editor resolution field's position to prevent overflow (#25566)

* GraphPanel: fix promql query editor resolution field's max height to prevent overflow

* fix test

* move menuPlacement to bottom instead

public/app/plugins/datasource/prometheus/components/PromQueryEditor.tsx

@@ -155,6 +155,7 @@ export class PromQueryEditor extends PureComponent<Props, State> {
             <div className="gf-form-label">Resolution</div>
             <Select
               isSearchable={false}
+              menuPlacement="bottom"
               options={INTERVAL_FACTOR_OPTIONS}
               onChange={this.onIntervalFactorChange}
               value={intervalFactorOption}

public/app/plugins/datasource/prometheus/components/__snapshots__/PromQueryEditor.test.tsx.snap

@@ -78,6 +78,7 @@ exports[`Render PromQueryEditor with basic options should render 1`] = `
       </div>
       <Select
         isSearchable={false}
+        menuPlacement="bottom"
         onChange={[Function]}
         options={
           Array [