[404 page] - broken links for the proposals and transactions, wrong css style

[mur-me]

I've found issues with the 404 page:

• proposals link is broken - should be link to the snapshot probably
• transactions link is broken - probably, it should be analytics page
• and the text css is white on white for the Oops! We can't find the page you're looking for. - should be the same as for the menu
  Screenshot: