Set rel-indicator image on update
Responding to reviews: test modified to check for unchangedness, indentation
Fixed CI issue, card created - empty attrs in FF are null, not empty string.
Swapped double for single quotes
Fix the left inspector to fill the height of the sidebar.
Merge pull request #218 from makyo/rel-icons-loadonce

To QA:

1. Start devel, watch the terminal
1. Deploy a bundle
2. Set one service in the bundle to 100 units
3. Watch terminal with simulator running; you should only see requests for rel icons when relation aggregatedStatus changes
Merge pull request #219 from huwshimi/left-inspector-full-height

Fix the left inspector to fill the height of the sidebar. I've tested the use of flexbox across our browser matrix.

This no longer needs the resize calculations as flexbox is smart enough to handle the adjustments we were making.

We need to fix the nested footer controls, but I couldn't figure out a smart way of doing that.
List machines in the machine view.
Lint fixes.
Merge pull request #222 from kadams54/mv-list

To QA:

You'll need to use the `/:flags:/il/mv/` feature flags. The machine view will come up in an empty state. Deploy a charm and verify that the machine view has been updated appropriately, both in the list and in the header ("X machines"). Destroy the service and verify that the list still looks good.