fix: Guard against accessing null ref with inline search input

[mrchief]

What does it do?

Guards against accessing null ref with inline search input.

Fixes # (issue)

Fixes #335

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• Updated documentation (if applicable)
• Added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• My changes generate no new warnings

[qlty-cloud-legacy]

Code Climate has analyzed commit c796ab2 and detected 0 issues on this pull request.

View more on Code Climate.

[coveralls]

Pull Request Test Coverage Report for Build 1336

• 2 of 2 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.07%) to 95.156%

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Totals
Change from base Build 1328:	-0.07%
Covered Lines:	586
Relevant Lines:	599

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💛 - Coveralls

[mrchief]

🎉 This PR is included in version 2.3.1 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

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