Added icons, helperfunction and new fancy notice message

Added icons from webcrunch resp. heroicons
Added helperfunction to display inline svg with the plugin inline-svg
Implemented fancy notice message webcrunch. Realy nice but does only
work with javascript on.

app/assets/images/icons/solid/list-bullet.svg

@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor" aria-hidden="true">
+  <path fill-rule="evenodd" d="M2.625 6.75a1.125 1.125 0 112.25 0 1.125 1.125 0 01-2.25 0zm4.875 0A.75.75 0 018.25 6h12a.75.75 0 010 1.5h-12a.75.75 0 01-.75-.75zM2.625 12a1.125 1.125 0 112.25 0 1.125 1.125 0 01-2.25 0zM7.5 12a.75.75 0 01.75-.75h12a.75.75 0 010 1.5h-12A.75.75 0 017.5 12zm-4.875 5.25a1.125 1.125 0 112.25 0 1.125 1.125 0 01-2.25 0zm4.875 0a.75.75 0 01.75-.75h12a.75.75 0 010 1.5h-12a.75.75 0 01-.75-.75z" clip-rule="evenodd"/>
+</svg>