delta parameter is missing from the url if pagination is done trough combo box

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.2.10 DXP FP15, 7.2.X, 7.3.X, 7.4.2 CE GA3, 7.4.3.4 CE GA4, Master
• Component/s: Tag Libraries > Liferay Frontend Taglibs
• Labels:
  • 7.4-known-issues
  • ee-ts
  • liferay-fixpack-dxp-15-7210
• Branch Version/s:
  7.3.x, 7.2.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/liferay-frontend/liferay-portal/pull/1252

Reproduction:

1. Start dxp 12 bundle and login as admin
2. Go to Content & Data → Web Content and create two Basic Web Contents
3. Go to the Home page and place an Asset Publisher widget
4. Click on the Asset Publisher's kebab menu and select Configuration→Display Settings
5. Change the Number of Items to Display to 1 and Pagination Type to regular then save
6. Click "next" to paginate
7. Note that the "_delta=4" parameter is included in the url
8. Change the page trough the dropdown selector

Expected: The url contains the "_delta" parameter

Actual: The url does not contain the "_delta" parameter

This issuer becomes more problematic, when someone using this taglib in their customisation. WIth the assetPublisher Portlet, the delta parameter is a portlet configuration, however with a basic usage if we are missing the delta parameter from the url, it will reset back to default.