[REQUEST] Snap windows, rename labels, unit change, # of decimal digits

[Falki-git]

https://discord.com/channels/1078696971088433153/1080340366995239004/1091808070855831612

• Snap windows to each other

• Click labels to edit/rename
  Ex) Horizontal Vel. → Velocity (H)

• Click units to change it
  Ex) m → km → Mm → Gm

• Click values to change # of decimal digits to display
  Ex) 100.012 → 100.01 → 100.0
  ... can maintain alignment with other values by leaving an empty space for each digit not shown

[Falki-git]

Partially fulfilled in #23 (unit change, # of decimal digits)

[Falki-git]

Fully filfilled with #28 (snapping, renaming)