Explorer redesign - Closes #796 #813 #816 #820 #825 #741

[MichalTuleja]

What was the problem?

This PR contains major changes to the Explorer UI and solves problems described in the issues #796 #813 #816 #820 #825 .

How did I fix it?

This repository branch contains changes for multiple minor issues that are present in the Explorer frontend and the backend.

How to test it?

Most of the changes are visible in the browser.

Review checklist

• The PR solves Feature Request: pagination instead of lazy load scroll #796 Add generic transaction page #813 Account: Transaction list and Voters/Votes should be displayed in tabs #816 Explorer U.I. enhancement for finding delgates in delegateMonitor #820 Info-icon for the actual Multi-Signature account missing #825 Move decimal places picker to the fixed nav bar #741
• All new code is covered with unit tests
• All new code was formatted with Prettier
• Linting passes
• Tests pass
• Commit messages follow the
  commit guidelines
• Documentation has been added/updated