Frontend fixes / improvements

• Smaller margins on mobile to leave more room for content
• Slightly smaller sidebar between desktop/tablet to leave more room for content
• Allow scrolling in tables
• Fixed a resizing issue on a library card
• Shorter format for dates/ago: Two minutes ago will no display either the hour if it's on the same day, or the date 03/05/2019

cc @ariasuni

Homepage

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Tables

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Track table on mobile

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