feat(Experiments): UX feedback from private beta of no-code experiments.

[Phanatic]

Problem

This PR addresses feedback from a private beta customer of no-code experiments.

1. Can't tell if all transforms apply on Element selection in a variant.
2. Allow editing variants before an experiment is launched.
3. Cannot select SPAN & H2 elements

Changes

1Show checkbox next to icon if a transform is enabled on the HTML element

👉 Stay up-to-date with PostHog coding conventions for a smoother review.

Does this work well for both Cloud and self-hosted?

Yes

How did you test this code?

👀

[github-actions]

Size Change: +347 B (+0.03%)

Total Size: 1.14 MB

ℹ️ View Unchanged

Filename	Size	Change
frontend/dist/toolbar.js	1.14 MB	+347 B (+0.03%)

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[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.

[posthog-bot]

📸 UI snapshots have been updated

2 snapshot changes in total. 0 added, 2 modified, 0 deleted:

• chromium: 0 added, 2 modified, 0 deleted (diff for shard 1)
• webkit: 0 added, 0 modified, 0 deleted

Triggered by this commit.

👉 Review this PR's diff of snapshots.