To string added to SIPPNode
"less or equal than" separation in safe interval initialization changed to "less than" to be consistent with separation detector
Changed the way polygons are visualized. Now only the border is shown.
Added support for polygons that are filled outside.
SIPP Wrapper test
Fixed the test
Merge with 85ecfab38f41c05c7067bb1f09624f38bf54eb61
Added default bounds
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