Admin panel rework

[vkuznecovas]

The admin panel currently is not written too well. Needs a major refactor and functionality expansion, with pagination and user management in mind.

[vkuznecovas]

#43 #75 #77 are pretty much a prereq here.

[vkuznecovas]

As #97 states the height needs adjusting

[mateossh]

I consider rewriting admin panel. Do you want to keep it as simple as possible? I'm asking because I want to add some state container (like for example Redux).

Edit: If you read this, can we chat in private? Can you send a DM to me on Twitter? My Twitter handle is the same as on GitHub