🐛 Fix the connections page crash

[jollycopper]

FormattedConn might contain undefined fields, causing the connection filter feature to crash sometimes in the hasSubstring() function. This PR fixes it by returning falsefor string matches when the string is null or undefined.

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Name	Status	Preview	Comments	Updated (UTC)
yacd	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	May 8, 2023 1:26pm

[haishanh]

Thanks!

[imyhxy]

I'm still encountering this issue with the newest mater docker image. Each time when I input "5" in the filter input box, the page is crash.