Add option for rich text editor to forms

[mariobehling]

The call for participation offers users to use Markdown. This is only good for techies. Please add a simple rich-text editor on the organiser and the public forms that currently allow markdown. Enable the configuration of the editor in the config file.

Editors usually have the option to allow filtered HTML/limit permitted tags. Just need to add a suitable existing library. We need only basic rich text capabilities e.g. font bold, italic, underline, strike-through, color, lists, link.

The following should be possible.

a, abbr, acronym, b, br, code, div, em, h1, h2,
h3, h4, h5, h6, hr, i, li, ol, p, pre, span, strong,
table, tbody, td, thead, tr, ul

And the following attributes:

Compare https://docs.pretalx.org/en/latest/user/markdown.html#using-html

[Darkboy17]

Please assign this issue to me.

[mariobehling]

Thank you for your interest. Issues are not usually assigned to new contributors. If you would like to solve this issue you can simply create a PR. It is unlikely that someone else would solve issues in the meantime.