Dialogs: Add comment to password popup (#4910)
Dialogs: Add comment to password popup (#4910)

Temporarily, adding a comment to the password popup regarding Github login. 

To be removed end of 2021

https://github.blog/2020-12-15-token-authentication-requirements-for-git-operations/

Closes #4909
sbcgua/abapGit,larshp/abapGit,larshp/abapGit,sbcgua/abapGit