Modifications applied on imported libraries:
* vuetify.less:
  - calc() is modified to ~"calc()": anything inside brackets in LESS is calculated at CSS transformation time,
      thus ~"..." is used to force less compiler to ignore computing value and let its interpretationn made in browser side.
  - Prefix general classes with ":not(.ignore-vuetify-classes)": this is added to be able to use Platform css classes inside Vuetify application without interferring with Vuetify CSS
      (for example: btn, btn-primary, alert-warning ...)
  - Delete font-family definition on ".v-application" element: the default font-family for all Vuetify components has to be the inherited font from eXo Platform.
  - Delete padding and margin reset definition defined for all elements:
      the default margin and padding definition for all elements using (*) generic selector is deleted to avoid applying it for all the application including default elements style predefined in eXo Platform
