Both `r2160:2164` and `[2160:2164]` can be used.
They will point to the Revision Log view for that range.
As such, there are similar to the log:#2160:2164 syntax.
The latter is more powerful, though, as one can restrict
the view to a given path (e.g. log:branches#2160:2164).
This closes #1259.
