Estimated reading time turns to "undefined" when content field is filled out

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.1.0 M2, 7.1.X, Master
• Component/s: Blogs
• Labels:
  • QA-V
• Fix Priority: 4
• Sprint: Rodimus Prime

Steps to reproduce:

1. Enable estimated reading time for Blogs in System Settings > Blogs
2. Navigate to site page and add a Blog portlet
3. Click New Blog Entry
4. Type a word into the content field

Expected result:
The estimated reading time that appears on the top of the Blog entry field should reflect how many words are in the content field. In this case the estimate should be 1 minute. If more paragraphs were added into the content field, this time estimate should go up.

Actual result:
The estimated reading time that appears on the top of the Blog entry field reads undefined
However, the estimated reading time of the Blog article, once published, displays the accurate reading time.

Reproduced on:
Tomcat 8.0.32 + MySQL 5.6.
Portal master GIT ID: ab79003b96c69f2fdc4085bc07340c12de044172