Advanced tab display

[madeso]

Update tab display to only display the relevant part of the file path instead of the file name. The other part of the oath should be either be cut or dimmed depending on what and where it is.

bold is used here for highlight, this is only as an example.

Single file open:
[main.rs]

Two files, same name
[main.rs | lib/main.rs]

Two files, same name, different extension:
[app.rs | app.png]

The actual logic probably needs to be tweaked as well, but the current system is too generic.

This is how brackets displays tabs: