Shortcut for layouts in sidebar

Closes #41 (closed)

This PR allows to include shortcut for some layouts in the main UI.

There is still few things to do

• fam and fa don't have the exact same size, maybe we have to setup a width style for the buttons
• I have hacked the style to reuse the icon selected style. We could see together the best way to share this style?
• Same for the margin. I have used br. I still dont know if it's better to use inline style, or to create a dedicated classname