use case 1 - the option is not added to the command line - PrusaSlicer defaults to the highest available core profile OpenGL version
use case 2 - the option specify an OpenGL version which supports core profile - PrusaSlicer select the required OpenGL version, if available
use case 3 - the option specify an OpenGL version which does not support core profile - PrusaSlicer defaults to the highest available compatibility profile OpenGL version
use case 4 - the option contains invalid OpenGL version - PrusaSlicer defaults to the highest available core profile OpenGL version
The previous behavior didn't merge two ExtrusionPaths with the same extrusion width, and it also could merge two ExtrusionPaths with different widths, which was unintentional, and it could also possibly create visible artifacts in some cases.
Because simplification of ExtrusionLoop in GCode::extrude_loop is working on ExtrusionPath and not on whole ExtrusionLoop, so previous incorrect behavior was preventing simplification and removing small extrusions like in #8455.
Some files have whitespace changes that make resolving conflicts difficult.
Take the version from master first, next commit will apply changes from master_250
SeamPlacer.cpp/.hpp files from master_250 were used, there should be no changes
in master that will be overwritten, the feature was backported from master and
only developed in master_250 from then on
CONFLICT (content): Merge conflict in resources/profiles/PrusaResearch.idx
CONFLICT (content): Merge conflict in resources/profiles/PrusaResearch.ini
CONFLICT (content): Merge conflict in src/libslic3r/CMakeLists.txt
CONFLICT (content): Merge conflict in src/libslic3r/Fill/Fill.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode.hpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/GCodeProcessor.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/GCodeProcessor.hpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/SeamPlacer.cpp
CONFLICT (content): Merge conflict in src/libslic3r/GCode/SeamPlacer.hpp
CONFLICT (add/add): Merge conflict in src/libslic3r/Geometry/Curves.hpp
CONFLICT (content): Merge conflict in src/libslic3r/PerimeterGenerator.cpp
CONFLICT (content): Merge conflict in src/libslic3r/Point.hpp
CONFLICT (content): Merge conflict in src/libslic3r/PrintConfig.hpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/ConfigWizard.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GCodeViewer.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GLCanvas3D.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/GUI_App.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/Gizmos/GLGizmoHollow.cpp
CONFLICT (content): Merge conflict in src/slic3r/GUI/Gizmos/GLGizmoSlaSupports.cpp
CONFLICT (content): Merge conflict in src/slic3r/Utils/FixModelByWin10.cpp
CONFLICT (modify/delete): t/perimeters.t deleted in HEAD and modified in master_250. Version master_250 of t/perimeters.t left in tree.
CONFLICT (content): Merge conflict in tests/fff_print/CMakeLists.txt
CONFLICT (content): Merge conflict in tests/fff_print/test_fill.cpp
CONFLICT (content): Merge conflict in version.inc
CONFLICT (modify/delete): xs/xsp/PerimeterGenerator.xsp deleted in HEAD and modified in master_250. Version master_250 of xs/xsp/PerimeterGenerator.xsp left in tree.
