Fix for withEither

Maciej Lenartowiczrequested to merge
with-either-props into dev

Just after releasing 1.3.1 I found out that usage of withEither is a bit limited so I had to pass the props (will be used in subordinates).

Also removed props spreading from Spinner as it passed stuff to it's HTML elements from Either component :(

Edited by Maciej Lenartowicz

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