Comment 3 for bug 368274

Agreed with simple and intuitive. But there are two ways with pros and cons:
1. undock on active workspace: e.g. with email-client docked you want to be able to have a quick look at new messages, dock and be back where you were.
2. undock on original workspace: e.g. with several workspaces each with their own class of applications like a. office; b. browser ; c. chat/email; d. torrent/music. Then you wish to keep apps on their own workspaces.
Also: without options config in alltray: default undocking in active workspace would override wm-settings. If not in alltray, where would you change this setting?

Not sure what best way is. Maybe two options in context menu with possibility to switch default; or assigning options to left and middle mouse button.