[TASK] Remove unused fields

Regular editors are allowed to use values which are not to an editor to decide, but to the designer/frontend developer. Some settings need to be done by CSS, or if necessary, by the layout field of a content element

This patch removes these fields, like spaceBefore, spaceAfter and section_frame
[TASK] Change the layout method of content element "Bullet list"

css_styled_content is using the "layout" field for making a distinction of <ul> and <ol>. This setting should be moved to a separate field

This patch fixes this by adding the field "bullets_type" and as a present it will add a definition list as well to the options