Currently (using default window positioning) the calibration dialog is often obscured by the test window. Either severely on smaller displays, or less so on larger displays.

The patch in #685657 semi-solves this.

Another nice addition would be to position the calibration dialog always in the lower-right of the screen, which means we'll always have the biggest part of the dialog readable. And most importantly the buttons will be operable.

(I'm not sure if this is possible, and in any case I'm guessing this will be window manager dependent, but it would be nice if this would work for the large mainstream window managers).