[Woo POS] Add missing transitions

A list of missing transitions in POS.

Time-box a specific amount of time and tackle as many as possible. I suggest prioritizing them by how often they are likely to be encountered.

Happy Path

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[ ] ‘Connect reader’ modal fade-in [3:44]
[ ] ‘Connect reader’ transition between states: fade in and icons transition into a new place with animation [3:46]

[x] ‘Check out’ slide out Product list, slide Cart to side, slide-in Totals [4:32]
[x] ‘Totals Text Fields’ transition from shimmering to loaded state [4:34]
[x] ‘Totals Text Fields’ moves down when ‘’Checking order’ appears [4:36]
[x] ‘Checking Order’ -> ‘Preparing for payment’ -> ‘Tap Swipe’ fade between transitions [4:37]
[x] ‘Tap Swipe Card’ -> ‘Processing payment’ transition [5:29]
[x] ‘Processing payment’ -> ‘Payment successful’ [5:35] transition