UI twitches when saving any repository language configuration

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.3.0 CE GA1, 7.3.10 DXP GA1, Master
• Component/s: Documents & Media
• Labels:
  • front-end
  • frontend
• Story Points: 1
• Fix Priority: 5
• Sprint: 036 - Clefable
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/80665

Steps to reproduce:

1. Add a content repository
2. Navigate to repository > Languages
3. Click the save button either in default languages or after selecting a custom language

Expected result:
All page elements remains static while the system displays a success message.

Actual result:
The muted or hidden fieldset is rendered, causing the page to "twitch." See video.

Reproduced on:
Tomcat 9.0.17 + MySQL 5.7.
Portal master 0bd2acaaf1b5db078068c1d45bfe7caf93b7aa51