Implemented redux on ReadCode/SendModal

[ranbena]

What current issue(s) from Trello/Github does this address?
This is a part of a few PRs to better the QR Scan implementation.

What problem does this PR solve?
The Send Modal code is a bit convoluted imho and now made simpler.
It handles notification errors by itself and lacks in static typing.

How did you solve this problem?

1. Added redux, hoc and spunky to deal with data, notifications and callbacks. This also allows adding withProgress to be used by the QR Scanner (upcoming commit depending on this one).
2. Removed the "step 1/2" logic and instead changing steps automatically if recipient data exists or not. So simple!

How did you make sure your solution works?
Manually tested. No change in functionality nor regression.
Go to Send -> Enter QR Code -> try it out

Are there any special changes in the code that we should be aware of?

Is there anything else we should know?

• Unit tests written?

[coveralls]

Pull Request Test Coverage Report for Build 5478

• 7 of 21 (33.33%) changed or added relevant lines in 5 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.1%) to 41.194%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/components/QrCodeScanner/QrCodeScanner.jsx	0	1	0.0%
app/components/Modals/SendModal/index.js	3	6	50.0%
app/actions/sendModalActions.js	3	8	37.5%
app/components/Modals/SendModal/SendModal.jsx	0	5	0.0%

Files with Coverage Reduction	New Missed Lines	%
app/components/Modals/SendModal/SendModal.jsx	2	0.0%

Totals
Change from base Build 5473:	0.1%
Covered Lines:	1029
Relevant Lines:	2286

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💛 - Coveralls

[comountainclimber]

This looks and works great excellent job @ranbena