UI contour and profile plot for Dale screen and others

[atsju]

Shall be usable on a 17" screen with 100% scaling (most people) and 125% scaling (Dale uses 250% with 2x2 times resolution so this is equivalent)

Both contour and profile plot have lines that are too thick on the new displays

OLD (left) VS NEW (right)

See #286 (comment) for original discussion