Member card cleanup: addresses and units

[jtrein]

We should be able to Cmd + F search by both a member's Ethereum address and their ENS address, if applicable.

• [x] Show ENS address below Ethereum address, if applicable.
• [x] CSS-truncate the ENS address when longer than the viewable area of the box
• [x] Use units {x}k , {x}mil at 1,000k in abbreviation

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