function getExtGlobComps (el, compList) {
  if (!compList) compList = []
  if (el.global || el.external) compList.push(el)

  if (el.children && el.children.length > 0) {
    for (let childEl of el.children) {
      compList = getExtGlobComps(childEl, compList)
    }
  }
  return compList
}
Creates an array containing all the global/external components inside.

@param {object} el : Current reviewing element
@return {object} : An array with the global/external components found inside.