Adding an option to prevent windows from being closed when a buffer in
the tabline is middle clicked and the clicked buffer is currently open
in a window.
When this option is enabled, instead of closing the window a new buffer
will be opened in all of the windows editing the clicked buffer instead.
This is my first pull request AND my first experience with vimscript, so
my apologies if this is a bit sloppy 😄
This is a new tabline extension, that displays both the buffers open and
the available tabs. This has been requested by #639 and fixes#639.
This is based on blings work on branch spike.
This uses the new highlight groups tab*_right, so that the separators
have the correct color. Also this makes some configuration variable
obsolete and therefore, they have been removed.
remove unused combined config variable, remove space after tab
