JS error when changing search form lookback dropdown

[tiffon]

Requirement - what kind of business use case are you trying to solve?

Avoid JavaScript errors on the search page.

Problem - what in Jaeger blocks you from solving the requirement?

Currently, the following JS error is thrown on when changing the lookback search form field:

Uncaught TypeError: _this2.props.onFocus is not a function
    at Select.js:1029
(anonymous) @ Select.js:1029
setTimeout (async)
timeoutFocus @ Select.js:1028
onOuterFocus @ Select.js:620
callCallback @ react-dom.development.js:107
invokeGuardedCallbackDev @ react-dom.development.js:144
invokeGuardedCallback @ react-dom.development.js:191
invokeGuardedCallbackAndCatchFirstError @ react-dom.development.js:205
executeDispatch @ react-dom.development.js:472
executeDispatchesInOrder @ react-dom.development.js:497
executeDispatchesAndRelease @ react-dom.development.js:597
executeDispatchesAndReleaseTopLevel @ react-dom.development.js:610
forEachAccumulated @ react-dom.development.js:577
runEventsInBatch @ react-dom.development.js:753
runExtractedEventsInBatch @ react-dom.development.js:763
handleTopLevel @ react-dom.development.js:4416
batchedUpdates @ react-dom.development.js:13125
batchedUpdates @ react-dom.development.js:2036
dispatchEvent @ react-dom.development.js:4498
interactiveUpdates @ react-dom.development.js:13187
interactiveUpdates @ react-dom.development.js:2057
dispatchInteractiveEvent @ react-dom.development.js:4474

Proposal - what do you suggest to solve the problem or improve the existing situation?

Replace the null with a no-op function in the redux-form-field-adapter.js.

jaeger-ui/packages/jaeger-ui/src/utils/redux-form-field-adapter.js

Lines 41 to 42 in f66f737

	onBlur={isValidatedInput ? onBlur : null}
	onFocus={isValidatedInput ? onFocus : null}

Any open questions to address

N /A