The addition of very small segments in OCE triggers sliver
removal/cleanup in the BREP generation that can get stuck in a very long
loop during STEP export of boards. These were introduced to ensure
closure of boards with small gaps that were too big for OCE to consider
joined.
Removing the small segments allows STEP export to proceed in a
reasonable time. This also decreases the default minimum gap size that
kicad2step uses to determine curve matching. This prevents mis-matching
small curves
Fixes: lp:1784626
* https://bugs.launchpad.net/kicad/+bug/1784626
Seth Hillbrand
Maciej Suminski
Cirilo Bernardo