Update the overview figure

[valosekj]

Changes:

• udpate segmentation box
• remove motion correction box
• merge template and atlas boxes into a single box
• add a new lesion analysis box
• add a new compression analysis box

[joshuacwnewton]

These changes are beautiful! There's a lot I love:

• Removing the tiny, unreadable text in the old Segmentation bubble.
• Adding very legible, colorful graphics in the Segmentation bubble.
• Increasing the size of the SCT logo and bubbles to make it more legible on smaller screens.
• The "zoomed in" lesion analysis figure does a great job illustrating the process.

My only critique is that there are still a few instances of tiny, unreadable text?

• In the "Template and atlas" bubble, the tract-based analysis shows 4 images + metric table. I wonder if it would be better to remove the metric table, and zoom in a little closer on the tracts?
• In the "Compression analysis" bubble, we see the 6 different shape morphometrics, but they are quite small (due to the graphs taking up a lot of space). I wonder if it would be better to, say, have only 1 graph (even if this is factually incorrect), and then blow up the morphometrics cord cross-section images to better display each metric?

These are nitpicks though, and overall I'm very happy with the changes. ♥️