Issue #1779026 by dagmar, tim.plunkett, sun, heyrocker: Convert Text Formats to Configuration System.

Issue #1833716 by quicksketch, Wim Leers, sun, TwoD: Added WYSIWYG: Introduce 'Text editors' as part of filter format configuration.

Revert "Issue #1833716 by quicksketch, Wim Leers, effulgentsia: added WYSIWYG: Introduce 'Text editors' as part of filter format configuration."

Fixing commit credit.

This reverts commit ee1b6de6.

Issue #1833716 by quicksketch, Wim Leers, effulgentsia: added WYSIWYG: Introduce 'Text editors' as part of filter format configuration.