I've had a couple requests for this since the 'esc to close' toggle was added, so since the activate/deactivate buttons are hard coded to this window I took them out of their respective tabs, shrunk them, grouped them up in the corner, removed the title bar, reordered some things, and cleaned up the tooltips.
As long as 'esc to close' is unchecked in the right-click context menu it should stay up all the time, and take up a very minimal amount of space. Click on the empty space within the window to drag it. The minimum resize has been adjusted to the size of one button. The window and buttons will be themed to your UI, and should be fully mix-and-match compatible.