(Fix) remove background color and center icons from Tabs component

[alongoni]

Closed #86

[github-actions]

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Type	Occurrences	Fixable
Errors	0	0
Warnings	0	0
Ignored	0	N/A

• Result: ✅ success
• Annotations: 0 total

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^{Report generated by eslint-plus-action}

[ghost]

Travis automatic deployment:
https://pr87--safereactcomponents.review.gnosisdev.com

[fernandomg]

there's a border-bottom prop, that must be removed:

[fernandomg]

there's a border-bottom prop, that must be removed:

hmm... now that I see the requirements, it seems to be required. But I'm not sure if the width is correct (@alongoni, thoughts?)

[ghost]

Travis automatic deployment:
https://pr87--safereactcomponents.review.gnosisdev.com

[fernandomg]

💯