Verify reagent/react-native rendering assumptions

[yenda]

Problem

We need to test the following assumptions

• if I have 5 subscriptions on a view, and the 5 of them change,
  does the view re-render once, 5, or some other random number of times?

• when I pass a map to a component, and I destructure that map in
  the arguments and only use keys that don't change, does the component
  still re-rerenders when the map changes?

Reagent tracks any dereferences to ratoms made during a component’s render function
render functions are rerun when their input data changes

(defview recovery-phrase []
(letsubs [flow [:hardwallet-flow]]
[react/view
;; is this re-rendered?
[display-recovery-phrase flow]
(if (= flow :create)
[display-recovery-phrase]
[enter-recovery-phrase])]))

(defview recovery-phrase []
(letsubs [flow [:hardwallet-flow]]
[react/view
[display-recovery-phrase flow]
;; is this re-rendered?
[enter-recovery-phrase]]))

Test new reagent, see if this is re-rendered.

Is root subscriptions a good practice or should we now aim for in-place subscriptions?

Acceptance Criteria

GUIDELINES.md file