Adding accessibility to tabs indicating active/inactive
TNL-1010: update final UI text strings.
Merge pull request #6362 from edx/clrux/edxnotes

Adding accessibility to tabs indicating active/inactive
Set default EDXNOTES_INTERFACE to localhost running default edx-notes-api
Merge pull request #6381 from edx/anton/edxnotes-ui-strings

[WIP] TNL-1010: update final UI text strings.
TNL-930: Turn off Student Notes when HAT is enabled.