[TASK] Trade: Unsubscribe from orderbook when leaving the trade tab

We don't need to be subscribed to orderbooks while not in trade tab. This is an optimiziation thing.
[TASK] Apps: Remove unneeded dependencies
[FIX] Exchange: Close the pathfind on tab change
[TASK] Remove unused timeout dependency from two controllers
[TASK] Listen to balancesUpdate instead of watching for lines
[FIX] appManager: Save the app only once
[TASK] Listen to blobUpdate instead of watching for userBlob
[TASK] Get rid of the navbar balance help popover
Merge pull request #1365 from vhpoet/task/optimize

[TASK] Optimizations