Allow node filtering via URL Hash

I had weird issues when I tried to add a filter text field so I implemented it via a hash. The use case for us was we use have client nodes on our app servers and all the client node stats are just clutter.

We'd access it with `index.html#master:true` for example.

I'm not really a JS dev and have zero experience with Ember so this is what I managed to hack up in a few minutes.