Unify Titles and new pages

Currently, we are adding new pages to block explorers, but each is a different design from the other. We need to make sure to unify the following pages and check others as well :

1. Witnesses Page as a base after #508 (closed) is merged
2. All Blocks Page
3. Balance History Page
4. Transaction Details
5. Block Details

We need to make sure:

1. Titles are coherent, and each page has a title and information about the title if needed
2. Margins on the container

Let me know of other changes we need to do