copy-pasting a text that includes a comma on epic tags results in 2 tags

Issue Summary

Tag formating is inconsistent when using comma in a pasted string.

during manual input, the comma is not allowed, as it ends the tag. However when using copy and paste method, the comma is not instantly taken in account and result in the display of one string, where the comma is included.

When saving the tag, the tag with a comma will break into two different tags, even if this is not the intention of the user. 

Steps to Reproduce

1. Open an Epic
2. Copy this text into the tag area "tag 1 part 1, tag 1 part 2"
3. Save the epic
4. Check the tag section

Expected Results

if copy and pasting, once copied it should immediately break into separate tags where the commas are located. 

Actual Results

• Before saving:
  
• After Saving:
  

Workaround

the workaround at this stage is to avoid using the comma separator in a string