Default to quick calibration, should be more than enough

Signed-off-by: Richard Hughes <richard@hughsie.com>
Generate display profiles with a perceptual rendering intent

Signed-off-by: Richard Hughes <richard@hughsie.com>
Correct the approximate timings in the calibration dialog

The last correction was still too conservative.

Signed-off-by: Richard Hughes <richard@hughsie.com>