1. open support wall count for normal support
Enabling this option makes normal support stronger and gives
better overhang quality, but also more difficult to removal.
Jira: STUDIO-5192
2. fix a bug where tree support (hybrid style) may get overlapped
extrusions near the walls.
3. fix a bug where raft layers can't be 1 in tree support
Jira: STUDIO-5261
Change-Id: Iadc0c67a9b50b5b221c8e83d5aa22ed282018cf8
(cherry picked from commit c0bb0084e386cb70ed6e16edf93190e4b38f5b90)
Fix organic support issues by syncing with Prusa's changes. Thanks to Prusa.
Jira: none
Change-Id: I96fa1a939767bb0b0d2e8a5fd72966bb10a2042e
(cherry picked from commit 89607dc73313e1b5d389674ed2d8f4f358bcb8b9)