fix(preview): Preview showing in markdown-only mode

[alizaberger]

Describe your changes

There was a strange bug occurring where if a user refreshed the page when in markdown + preview mode, and then switch first to rich-text mode and finally to markdown only mode, the preview was incorrectly showing.

screen-capture.4.webm

What was happening was that the user's preference was (correctly) setting the default for preview to be true, but the preview visibility toggle was not being triggered when changing from rich-text mode to markdown mode, since they both have preview set to false.

This PR fixes the behavior by always setting the preview visibility when changing editor modes.

PR Checklist

• All new/changed functionality includes unit and (optionally) e2e tests as appropriate
• All new/changed functions have /** ... */ docs
• I've added the bug/enhancement and other labels as appropriate

Environment(s) tested

• Device: desktop
• OS: [e.g. iOS]
• Browser: chrome
• Version [e.g. 22]

Additional context

Jira

[changeset-bot]

🦋 Changeset detected

Latest commit: 572bec3

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
@stackoverflow/stacks-editor	Patch

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[netlify]

✅ Deploy Preview for stacks-editor ready!

Name	Link
🔨 Latest commit	572bec3
🔍 Latest deploy log	https://app.netlify.com/sites/stacks-editor/deploys/681213853f1c610008cf8207
😎 Deploy Preview	https://deploy-preview-436--stacks-editor.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.