The titles lose the class when edited

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.3.10 DXP GA1, Master
• Component/s: Pages > Page Editor, ~ [Archived] Liferay Themes > Fjord
• Labels:
  • echo-board-out
  • frontend
• Fix Priority: 3
• Epic Link: fi-fjord-3.0-marketplace-release
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/73517

Related to https://issues.liferay.com/browse/LPS-82812

Steps to reproduce:

1. Start Liferay and deploy Fjord theme lpkg
2. Restart Liferay
3. Create Site based on Fjord Site template
4. Go to Home page
5. Click the pencil icon to enter "Edit" mode
6. Edit the title in the Actions fragment

Actual result: The title, in the Actions fragment, lose the default class `display-4` when edited

Expected: Formatting of this areas is persistent after editing.