Framework: implement redux persistence for state/plugins

[gwwar]

Implement persistence for state/plugins:

• You'll need to create a schema to represent what valid state looks like
• handle SERIALIZE action in reducer to return a plain js object to persist
• handle DESERIALIZE action in reducer. If state is valid, return state and initialize with immutable js if needed. If data is invalid, return the default initial state.

return isValidStateWithSchema( state, schema ) ? state : defaultState;

• Tests for serialize, deserialize, and invalid data cases

See: #2754

[rralian]

@gwwar what should we do with this considering we're moving on to plans work?

[gwwar]

Sorry, I can close out these stub issues. I'll be chipping away at these in my spare time.

[rralian]

No worries, I'm just doing some cleanup.