[POC] PIM-2968 Disabled wysisyg forced root block

| Q                    | A
| -------------------- | ---
| Bug fix?             | no
| New feature?         | no
| BC breaks?           | no
| CI currently passes? | maybe
| Tests pass?          | yes
| Scenarios pass?      | yes
| Checkstyle issues?*  | no
| PMD issues?**        | no
| Changelog updated?   | no
| Fixed tickets        | PIM-2968 (and probably PIM-2965 also)
| Doc PR               |

There are several consequences of activating this [TinyMCE option](www.tinymce.com/wiki.php/Configuration:forced_root_block).

## Saving blank value
This doesn't change. Blank value (meaning value not even containing a root tag) will remain blank.

## Saving non html value
Given the value is "Lorem Ipsum", this is what happens when saving:

| Before             | After       |
| ------------------ | ----------- |
| `<p>Lorem Ipsum</p>` | `Lorem Ipsum` |

## Saving value containing special characters
Given the value is "Lorem & Ipsum", this is what happens when saving:

| Before                   | After             |
| ------------------------ | ----------------- |
| `<p>Lorem &amp; Ipsum</p>` | `Lorem &amp; Ipsum` |

## Saving html value
Given the value is "`<p>Lorem Ipsum</p>`", this is what happens when saving:

| Before             | After              |
| ------------------ | ------------------ |
| `<p>Lorem Ipsum</p>` | `<p>Lorem Ipsum</p>` |

## Carriage Return
Given the value is "Lorem Ipsum", this is what happens when inserting a carriage return between "Lorem" and "Ipsum":

| Before                   | After                  |
| ------------------------ | ---------------------- |
| `<p>Lorem</p><p>Ipsum</p>` | `Lorem<br /><br />Ipsum` |

With the option deactivated, you have to press Maj+Enter to create paragraphs.