Feature Request: Add support for tree hierarchy

[hwmaier]

getResources processing yields a flat view of a resource tree.

There are application where a tree view would be beneficial and a tree view cannot be achieved by chaining getResources calls as parameters (eg filter parameters) cannot be passed down the chain. Other snippets which create a tree, like WayFinder on the other hand do not support filtering.

There is currently a work around using a snippet called getResourcesTree (refer to http://modxcms.com/forums/index.php/topic,43832.msg333619.html#msg333619) but it would be nice to have such a functionality integrated into getResources.

I am happy to provide a patch with that feature integrated using sortby='tree' as a way to configure this feature. I also would then add an additional template tplContainer so containers can be renderd differently.

[bobbwal]

sortby='tree' would be a really useful feature.