Merge branch 'richtext-widget' into 'dev'

rich text widget documentation

See merge request documentation/doc!17

source/import_documentation/Widgets/Reference.rst

@@ -37,6 +37,7 @@ A widget is built like this.
 
       -  ``text``: set ``value`` in an ``<input>`` of type ``text``
       -  ``textarea``: set ``value`` in a ``<textarea>``
+      -  ``richtext``: set ``value`` in an ``<div>`` and initialize a light rich text editor by using ``Quill``.
       -  ``checkbox``: create a checkbox, which is checked if ``value == true``
       -  ``date``: set ``value`` in an ``<input>`` of type ``date``
       -  ``rangedate``: set 2 values in 2 ``<input>`` of type ``date``. Used for filtering with min and max.
@@ -81,4 +82,4 @@ A widget is built like this.
    -  ``date``: transforms the value in a date, in the browser’s default locale format.
    -  ``datetime``: transforms the value in a date and time, in the browser’s default locale format.
    -  ``multiline``: Shows a value on multiple lines (replace ``\n`` by ``<br>``)
-
+   -  ``markdown``: Takes markdown code and displays formatted text. Works only with a display template (value, div, link).