UI/UX improvements

[errows]

• Improve content structure and item styling (menu, items, etc)
• Harmonize styles (buttons, fields, etc)
• Create an Antd style that we can re-use for other dapps
• Add score tooltips (hover on the singlebar chart)
• Create a simple logo
• Improve footer and show "Powered by dfuse"

[dliuproduction]

I have some more here:

• Larger/thicker pool selector dropdown
• Highlight idea when hovering to show it's clickable
• Alternate background colors OR use borders to separate each idea
• Vote form should be larger, ICE letters need more description