Layer5: Make language flags responsive

[leecalcote]

Current Behavior
The language flags do not have a breakpoint similar to the social / contact icons.

Desired Behavior
Ideally, the language flags resize at the same breakpoint as does the social / contact icons.

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Screenshots
Full size images:

Social / Contact buttons are responsive, but not the language flags:

[Nikhil-Ladha]

@sarthakpranesh, please assign an issue to yourself before taking up one, so that there isn't any misunderstanding in future. And if it's assigned to someone else, do ask them once before working on that 🙂

[leecalcote]

@sarthakpranesh, it's fantastic of you to lend a hand here. It looks like React, Go and many of the technologies that we focus on the Layer5 community are of interest to you. We would love to have you join --> http://slack.layer5.io. Please do. 👍

[sarthakpranesh]

@leecalcote, I'll be most pleased to join :smile: