Better handling of multiple buffers with the same file name

[muhmud]

Is your feature request related to a problem? Please describe.
When there's multiple buffers with the same file, the buffer section is not very helpful to tell them apart.

Describe the solution you'd like
It would be good if the name displayed contained enough of the parent directory structure to make the name unique, as does the bufferline plugin. Also, through a shortcut, the complete path to a buffer file should be displayable.