Add checkbox to disable shortening of paths

[ArniDagur]

As you can see, I've essentially never written JavaScript before, but I got it working to my satisfaction: An alternative approach would be to show the full title on hover, as suggested in #114.

Fixes #114

[bjorn3]

I think you will want to edit the source typescript files instead of the generated javascript files: https://github.com/plasma-umass/coz/tree/0e42254bd7393bf20b63cea47b991e5fd321b5d2/viewer/ts

[emeryberger]

I've merged another version that should do what you want.