feat(build): group components in checkbox selection

This PR adds a Grouping Header to the component selection at install time.

It's more a hack by using disabled entries, but works out good enough 😄

I, for now, decided against renaming the form.js to formvalidation.js because i fear a too big breaking change and most probably people who want form elements also want the validation anyway.
I could have just changed the checkbox selection name to "formvalidation" but effectively the script would have continued with "form" anyway which probably creates more confusion.

Author: lubber-de

package-lock.json

@@ -61,7 +61,7 @@
     "gulp-replace": "^1.0.0",
     "gulp-rtlcss": "^1.3.0",
     "gulp-uglify": "^3.0.1",
-    "inquirer": "^7.0.5",
+    "inquirer": "^8.2.0",
     "map-stream": "^0.1.0",
     "mkdirp": "^0.5.1",
     "normalize-path": "^3.0.0",