Improve friendly url support to allow UTF8 characters

• Type: Task
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Affects Version/s: None
• Fix Version/s: None
• Component/s: Collaboration > Blogs, Knowledge Base
• Labels: None
• Epic/Theme:
  • Technical_Task

Right now friendly urls for Knowledge Base and Blogs can be customized but it only allows a limited set of characters that is very restricted, specially for non latin characters. 

On the other side, friendly urls for pages can be customized too and they support a wider range of characters, even including emojis. 

The goal of this task is to increase the number of characters allowed in the friendly url to become consistent with pages and to allow non latin characters as part of the friendly urls.

This is something that affects at least to Knowledge Base articles and Blog Entries.