Admin ui

First step to a new shiny admin UI. This close #143 
Still a lot of room for improvement, but the "don't break eyes" milestone could be considered as reached.

Other improvement will occur in master except for major change that will also create dedicated separate branch.

Enjoy. And comment are welcomed of course, either for "houra" and "bouhhh".
On some pages, one line of help is always visible, not on others. What was the actual goal?