Refactor app state

[vgeorge]

In #33 we started refactoring the app state to make it easier to introduce new features and reduce tech debt. So far it has been successful in making the state logic more manageable, but there were features that needed to be disabled momentarily until they were refactored into the new approach.

This is a ticket to track the features that need to be reinstated and also the regressions that were introduced in the refactor:

• Features:

  • Layers panel
  • Batch workflow
  • AOI edit
  • Retrain tab
  • Refine results tab

• Regressions:

  • Clicking on User Dropdown, "Project New" doesn't redirect to a new project

Please feel free to add items that are not tracked elsewhere.

cc @geohacker @srmsoumya

[geohacker]

@vgeorge looks like the CPU/GPU toggle no longer exists after this refactor.

Here's is how it looks on landcover.io