Introduce a "displayTitle" option to the hierarchy macro

In the livetable, we want to display the "location" of a document like this:

Since this location will be used in different places, I propose to add a velocimacro in macros.vm

Example of usage:

Note: it can cause a problem for the filtering. If the user writes "/" in the search field, she will have problems.

*Edit*: after more thinking, it's better to add a displayTitle option to the #hierarchy() macro instead of creating a new macro. This option will have displayTitle on by default (current behavior).