generic Width property to customize the width of Content and Input component

[FabienArcellier]

I would like to be able to put them at maximum width for all content type components. This is extremely useful for putting buttons in an action bar without having to code css.

• it will have options in pick :
  • Full width
  • Fit content
  • Fix width
  • Factor width

The goal would be to have this generic component directly in style section.

• it will generate css code for width

• it will apply on every component in input and content section