Footer with buttons is not displayed at the bottom of the iframe

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP1, Master
• Fix Version/s: 7.0.0 DXP FP2, 7.0.0 DXP SP1, 7.0.3 CE GA4, 7.1.X, Master
• Component/s: Frontend Infrastructure, Themes Infrastructure
• Labels:
  • QA-AUTOMATION
  • liferay-digital-enterprise-70-sp1
  • liferay-fixpack-de-2-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/13948
• QA Test Name:
  • PGWebcontentsearch#SearchWebContentCategory
  • PGWebcontentsearch#SearchWebContentCategoryQuotes
  • PGWebcontentsearch#SearchWebContentTag
  • PGWebcontentsearch#SearchWebContentTagQuotes
  • StagingUsecase#PublishRenamedTags
  • XssUsecase#ViewBookmarkNoXSS
• QA Test Score: 22

Pasting Austin Chiang's comment from below:
This issue can be reproduced in the Notifications configuration portlet following the steps below:
Go to My Account > Notifications
Click on portlet vertical ellipsis > Configuration
Assert Save and Cancel buttons are not displayed at the bottom of the iframe
Reproduced on:
Tomcat 8.0.32 + MySQL 5.6.
Portal master GIT ID: 1a804b26353c2c0434130ab0697e2578526ed0ee
Portal ee-7.0.x GIT ID: 88674ccaf2c0556d681bd99bd528151db96ae0ee
Portal DXP GA1 + FP1

To reproduce:
1. add a web content display to the page
2. click on add new basic web content

Actual:
Footer with Publish, Save as Draft and Cancel buttons is not displayed is not displayed at the bottom of the iframe

Expected:
Display footer at bottom of page

Tested on 130c7b