Support for Dockable windows in plugins

Moderator: kfury77

Forum rules
Please follow these guidelines when posting feature requests. This will help to increase the value of your contribution.

Do not create new topics for already requested features. Add your comments to the existing feature request topics instead;
Create separate topic for each feature suggestion. Do NOT post a number of non-related feature suggestions in a single topic;
Give your topic a meaningful title. Do NOT create topics with meaningless titles, such as "My Suggestion" or "My Problem".

Please note that we DO READ all suggestions, even if a reply is not posted. Thanks!