Fix width of fieldgroup after the fix of Off-canvas style resets in Drupal core

Problem/Motivation

Drupal 9.1.6 was released 7 Apr 2021 at 14:24 EEST

https://www.drupal.org/project/drupal/releases/9.1.6

#2958588: Off-canvas style resets are overriding styles (especially SVGs) resulting in display issues
#3207629: Update Drupal core from 9.1.5 to 9.1.6 ( ~9.1 ) and remove committed patches

Steps to reproduce

After the update of Drupal core to 9.1.6
When I try to edit the layout for a landing page
Then the style of the Off-canvas is not right

Proposed resolution

• Fix the width on fieldgroups

Remaining tasks

• Quick fix
• Test
• Review
• Quick fix release
• Send Patch to BLB and Bootstrap Styles module
  #3211154: Fix width of fieldgroup after the fix of Off-canvas style resets in Drupal core

User interface changes

API changes

Data model changes