Remove feature from SVG names

[gjjones]

I'm looking to start adding SVGs that serve the same purpose at other SVGs in edna. Using the current scheme, they would have the same names. Any thoughts on a better naming convention?

[gjjones]

Naming based on their visual appearance seems like a better idea. It would involve less clashing, and naming of these files doesn't feel like it needs a purpose-based name(like transport-prev). Describing the display can be more lengthy too, so these might get ugly in CSS.

Example is arrow-slim-left vs transport-prev.

[wylie]

We may want to do this as we implement GruntIcon 2.0 ( #45 ). Will need to look into inline SVGs a bit more. As we transition over these specific names might cause headaches when we bring these into the template.