Console TypeErrors in New Blog Entry form

• Type: Regression Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, Master
• Fix Version/s: 7.0.0 DXP FP58, 7.0.0 DXP SP9, 7.0.X, 7.1.X, Master
• Component/s: Collaboration > Blogs, Frontend Infrastructure
• Labels:
  • 7.1-must
  • QA-V
  • liferay-dxp-70-sp9
  • liferay-fixpack-de-58-7010
  • profiq
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Story Points: 1
• Fix Priority: 3
• Sprint: 005 - Charmeleon
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/60361

When user exits blog creation by click on Content > Blogs an then wants to create Blog again, typeError are in console:

TypeError: a is undefined
 /o/frontend-editor-ckeditor-web/ckeditor/ckeditor.js?browserId=firefox&minifierType=js&languageId=en_US&b=7100&t=1524482453951:888

Steps to reproduce:

1. Go to Content > Blogs
2. Add new Blog via button
3. Fill title, subtitle
4. Click on Content > Blogs
5. Add new blog
6. Click in Content or Title or Subtitle

Actual result:
Errors in console.
Expected:
No errors

Failed:
Client: Firefox 59, Chrome
Server: Liferay CE master git id 3e7844263ed6e00160da66ae9b30934e66e366bb, MySQL 5.6, Tomcat 9.0.8
Works correctly:
Client: Firefox 59, Chrome
Server: Liferay CE 7.0.5 GA6, MySQL 5.6, CentOS

Priority: S3 + L2 = 3

Reproducible:
liferay-portal-ee 7.0.x GitId: a138c86231f4c7b5170bd1fec4f545f8ee7479b5