Fix CKEditor text-fields issue of not clickable texts due to interaction with core/drupal.dialog

Thank you Yasmeen for reporting and patching
Valid issue

Let us check first on All Deprecated unused jQuery UI asset libraries
as jQuery UI is being phased out from Drupal core
They are replaced by other libraries
like Popper.js added to Drupal core to replace jQuery UI Position

#3051352: [Plan] Remove unused jQuery UI components and replace with a suite of contrib packages for the continuous upgrade path

https://www.drupal.org/list-changes/drupal/published?keywords_descriptio...

Let us check if core/jquery.ui.dialog will stay in core

Can you replace the patch to use Popper.js instead of jQuery UI? Or is Popper.js not ready yet to be used?

Now Popper.js is loaded and used in all the site - Back-End and Front-End
Not sure if it will do the same function in dialogs or modals

Lauri from the Drupal Acceleration Team and Acquia helped us
In #3115895: Provide support for Popper.js ^2.0.0 core/popperjs library and Drupal 9

• Drupal 8.8.x is using popper.js 1.x which work well with Bootstrap 4
• Drupal 9.x is using popper.js 2.x .. which may have issues with the current Bootstrap 4

Updating to the latest Vartheme BS4 will help
https://www.drupal.org/project/vartheme_bs4/releases/8.x-6.8

Using core/popperjs from Drupal core in

• vartheme_bs4.libraries.yml
• VARTHEME_BS4_SUBTHEME.libraries.yml

Please follow with #3115895: Provide support for Popper.js ^2.0.0 core/popperjs library and Drupal 9
If you needed to update your old generated sub theme

I do think core/jquery.ui.dialog may stay in core code
if you search for it in #3051352: [Plan] Remove unused jQuery UI components and replace with a suite of contrib packages for the continuous upgrade path

Popperjs is a replacement for something else
Popper.js added to Drupal core to replace jQuery UI Position
https://www.drupal.org/node/3086643

core/jquery.ui.dialog has no replacement yet!

core.libraries.yml

Better to use core/drupal.dialog so it will work even if they did the switch to other ui library

The "core/jquery.ui.dialog" asset library is deprecated in drupal:8.8.0 and is removed from drupal:9.0.0. See https://www.drupal.org/node/3067969