ENH: Tractogram *Slice width* option
New Slice width option (--sliceWidth / -sw on the CLI), allowing the width of 2D tractogram slices to be adjusted.
A couple of other unrelated changes:
- Plot panels will now use a solid line by default for all overlays, instead of cycling through all possible line styles.
-
cluster_mask_*images from FEAT analyses will now be shown as mask outlines when FSLeyes is started with--autoDisplay.