Watch-resizing

Adds "SKINTIGHT" as agreed in #4956.  Tested and found that it wasn't a
problem with fitting Suit & Trenchcoat, nor with the flannel on a
Lumberjack.

Hoping it works for everyone.
Arm-coverage gone

After conversation with Rivet in IRC, this is probably the best
solution.  Done.
Merge pull request #4963 from KA101/Watch-resizing

Watch-resizing