Sticker boxes

[Magnus Forsberg]

Let's put this to bed:

- Do we want 1 or 1.5 LDU for the standard corner radius?
- Do we want 1 or 2 LDU for the standard distance from edge?
- Are we ok with having the non-rounded corner rectangular and circular/oval stickers use resizable prims instead of a stickerback file?

I want to avoid a massive rework of all the stickers.
A standard is perhaps good, but I think it is wrong to force the use of something that feels wrong to the author.
Corner radius and distance from edge may vary over time. Older sticker tend to be bigger, reaching all the way to the edge of the part.

All we really need to do is to define a way to number and describe the backsides that are reused often.
Some parts are often stickered, and need a common sticker backside. That's all.

We should choose a standard as close to the problem we are trying to solve.