[$40] Interview Tab design off: Add options to select and decline a candidate

[wdprice]

Per earlier discussions, the Interview tab designs were updated to accommodate the ability to select or decline a candidate from that page:

What has been implemented:

The latest designs:

Design link: https://marvelapp.com/prototype/921gg0f/screen/78382377

[wdprice]

CC: @urwithat

[maxceem]

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