I tried to maintain the current scroll position
within a list however this caused many issues
to do with outdated data, as well as performance issues.
Now we are going back to just refreshing any list on focus.
Closes#184
This simplifies our codebase greatly by
only having a single stack navigator and
a single drawer navigator. Previously we had
a stack navigator for every main page on the drawer.
Every time we create/update/delete fire a DeviceEventEmitter
event for gym sets. Then we subscribe to the changes in relevant
components.
Also fixed flickering of "No data yet" on graphs page.
