feat(client): Unify donation loading state (#43179)

* initial loading state unification

* feat(client): show buttons after 3 seconds

* fix: use window.setInterval explicitly

Otherwise TS assumes that it's node's setInterval

* feat(client): remove spinner when first button load

* feat(client): move the loader to the donate page button area

* feat(client): extract grid from modal donation form

* feat(client): remove duplicate donation forms

* feat(client):extract unused components from donationForm

* feat(client): load paypal on load not onInit (for perf)

* feat(client): set paypal loading state if stripe already loaded

* feat(clinet):make lpaypal oading condition strickt.

* Apply suggestions from code review

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

* feat: clean up

Co-authored-by: Oliver Eyton-Williams <ojeytonwilliams@gmail.com>

client/src/redux/index.js

@@ -33,7 +33,11 @@ export const defaultDonationFormState = {
   redirecting: false,
   processing: false,
   success: false,
-  error: ''
+  error: '',
+  loading: {
+    stripe: true,
+    paypal: true
+  }
 };
 
 const initialState = {