fix(webview): remove extra padding

[bkettle]

Removes extra padding from the webview UI.

setSearchItems has a type error (or did for me), and I think it's unused, so I commented it out

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• Purpose of the code is evident to future readers
• Tests included or PR comment includes a reproducible test plan
• Documentation is up-to-date
• A changelog entry was for any user-facing change
• Change has no security implications (otherwise, ping security team)

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[semgrep-zcs-prod-semgrep]

Semgrep found 2 handle-localstorage-errors findings:

• src/webview-ui/src/utilities/vscode.ts
  • L84 - Triage
  • L104 - Triage

We might not have access to localStorage, so we need to catch exceptions that come from these calls

_{Ignore this finding from handle-localstorage-errors.}

Semgrep found 1 no_console_logs-20220113-201024-16318 finding:

• src/webview-ui/src/utilities/vscode.ts
  • L49 - Triage

Do not commit debugging console.log statements in code that is deployed.

_{Ignore this finding from no_console_logs-20220113-201024-16318.}