fix: safer toolbar function

[pauldambra]

see https://us.posthog.com/project/2/error_tracking/295441fc-c916-4257-a1cb-4d896601ad82 and https://bsky.app/profile/victornido.bsky.social/post/3leti5mx6q22j

getting (de.ph_load_toolbar || de.ph_load_editor) is not a function error

it's not clear why to me, but we can at least make it fail gracefully

[vercel]

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Name	Status	Preview	Updated (UTC)
posthog-js	✅ Ready (Inspect)	Visit Preview	Jan 3, 2025 11:42am

[github-actions]

Size Change: +800 B (+0.02%)

Total Size: 3.22 MB

Filename	Size	Change
dist/array.full.es5.js	262 kB	+81 B (+0.03%)
dist/array.full.js	365 kB	+81 B (+0.02%)
dist/array.full.no-external.js	364 kB	+81 B (+0.02%)
dist/array.js	179 kB	+79 B (+0.04%)
dist/array.no-external.js	178 kB	+79 B (+0.04%)
dist/main.js	180 kB	+79 B (+0.04%)
dist/module.full.js	365 kB	+81 B (+0.02%)
dist/module.full.no-external.js	364 kB	+81 B (+0.02%)
dist/module.js	179 kB	+79 B (+0.04%)
dist/module.no-external.js	178 kB	+79 B (+0.04%)

ℹ️ View Unchanged

Filename	Size
dist/all-external-dependencies.js	206 kB
dist/customizations.full.js	12.6 kB
dist/dead-clicks-autocapture.js	14.4 kB
dist/exception-autocapture.js	9.48 kB
dist/external-scripts-loader.js	2.64 kB
dist/recorder-v2.js	115 kB
dist/recorder.js	115 kB
dist/surveys-preview.js	57.6 kB
dist/surveys.js	63.3 kB
dist/tracing-headers.js	1.76 kB
dist/web-vitals.js	10.4 kB

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