[x] name peaks
[x] move peak
[x] peak radii
[x] keyboard shortcut for contours
[x] keyboard shortcut for slice
[x] reset zoom button
[x] fitting toggle
[x] fitting status background
[x] save output
[x] figure out amplitudes / intensities
[x] performance - restrict fitting area to ROIs
[ ] scale fitting by noise
[ ] accept spectrum planes / multiple pseudo3Ds as input for relaxation