Rounded Huawei Watch Charging Stand

A charging stand for the Huawei Watch. Based on beavertank's "Minimalist Huawei Watch Charging Stand - Mk. 2" with the following changes:

* Watch is centered on the holder, not way off to the edge
* All parts are filleted using wide compound fillets
* The shelf for the watch is thinner and has a flat cross-section, not triangular, for a cleaner look
* The base contains openings for inserting 8 US quarters, 50 euro cent coins, or (with a bit of sanding) British 20 pence coins.
* Cable channel is slightly narrower to better hold the cable in place

Very little post-printing finishing is needed. The coins are inserted in the bottom. At least on my print, they were pretty snug without any adhesive, but I covered the bottom with masking tape (as shown in Post-Printing) to prevent the coins from coming loose or scratching my night stand. It's almost impossible to knock over accidentally with over 45 grams in the base. I also put some self-adhesive felt on the top of the base (as sh