feature: Adds trailing commas

[comountainclimber]

What current issue(s) from Trello/Github does this address?
Ports over the work that @ranbena did here => #1763

What problem does this PR solve?

How did you solve this problem?

How did you make sure your solution works?

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 5525

• 8 of 45 (17.78%) changed or added relevant lines in 34 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 40.676%

---

Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
app/actions/contactsActions.js	0	1	0.0%
app/actions/icoTokensActions.js	0	1	0.0%
app/actions/networkActions.js	0	1	0.0%
app/actions/pricesActions.js	0	1	0.0%
app/components/Blockchain/Transaction/index.js	0	1	0.0%
app/components/Contacts/ContactForm/ContactForm.jsx	0	1	0.0%
app/components/Contacts/ContactForm/index.js	0	1	0.0%
app/components/Modals/AddContactModal/index.js	0	1	0.0%
app/components/Modals/TokenModal/TokenModal.jsx	0	1	0.0%
app/components/Modals/TokenModal/index.js	0	1	0.0%

Totals
Change from base Build 5521:	0.0%
Covered Lines:	1032
Relevant Lines:	2322

---

💛 - Coveralls