Add a new suport style "Tree Organic" from Prusa, as organic support is
faster and seems more strong in some cases. Thanks to Prusa.
Feature detection including sharp tail, small overhang, long cantilever,
are still kept.
Known issue: first layer support path may go outside build plate.
Jira: STUDIO-2358
Github: #2420
Change-Id: I4cec149bf4fa9eb733ae720ac1a7f65098e3b951
(cherry picked from commit d977bc5d3b4609f4fec0aa68152a33cacf184c4a)
Arthur
salt.wei
lane.wei