fix: Reloading toolbar after closing

[benjackwhite]

Changes

Noticed you can't re-open the toolbar programatically after closing it.

• Changed the logic to check for existing localstorage key. If it exists then exit, otherwise re-open the toolbar.
• Also cleaned up some code around loading the script

Checklist

• Tests for new code (see advice on the tests we use)
• Accounted for the impact of any changes across different browsers
• Accounted for backwards compatibility of any changes (no breaking changes in posthog-js!)

[github-actions]

Size Change: +838 B (0%)

Total Size: 943 kB

Filename	Size	Change
dist/array.full.js	225 kB	+208 B (0%)
dist/array.js	124 kB	+210 B (0%)
dist/es.js	124 kB	+210 B (0%)
dist/module.js	125 kB	+210 B (0%)

ℹ️ View Unchanged

Filename	Size
dist/exception-autocapture.js	12.1 kB
dist/recorder-v2.js	106 kB
dist/recorder.js	106 kB
dist/surveys-module-previews.js	62 kB
dist/surveys.js	58.3 kB

_{compressed-size-action}

[pauldambra]

i'll trust the test 👍