Display least significant crag in ascent stream event

[lordyavin]

On theCrag we have a mixed structure of major climbing areas, aka crags. Sometimes the top level crag (TLC) just contains cliffs and sectors, in other cases the TLC contains sub crags. In any case the current stream implementation lists the name of the TLC if someone logs an ascent. In areas where the TLC has a deep structure of sub crags this information is to broad, in my opinion, but there are at least two use cases:

Use cases:

1. As a climber that knows each crag of my home crag, I want to see the least significant crag to be listed in my feed if someone logs an ascent.
2. As a tourist climber that is not familiar with all crags of an TLC I don't care about the least significant crag where someone logs an ascent.

To match both use cases I propose to change the stream display of an ascent to list at first the least significant crag and the TLC as second, if one exists. This may be rendered in braces on mobile or as mouse-over-tooltip on desktop