* Check Unsaved changes (partially related to #5903)
+ Allow create new project when Plater is empty, but some of presets are modified (related to #5903)
+ When creating new project allow Keep or Discard modification from previous project
+ Added check of changes:
* before any load project (including DnD and "Load From Recent Projects")
* before preset updater
* when configuration is changing from the ConfigWizard
+ Dialog caption is added for each check
+ Create/Destroy ConfigWizard every time when it's called
* Check Unsaved changes: Next Improvements
+ For dialog "Save project changes" added a reason of saving and name of the current project (or "Untitled")
+ UnsavedChangesDialog: Headers are extended to better explain the reason
+ Preferences: Fixed tooltiops for "Always ask for unsaved changes when..."
+ Suppress "Remember my choice" checkbox for actions which are not frequently used
* Fixed behavior of the application when try to save changed project but "Cancel" button is selected in "Save file as..." dialog
* Check unsaved changes: Improvements for Config Wizard - Check all cases when presets should be updated
+ Fixed info line for Materials pages. Text of the info relates to the printer technology now
* Improved suggested name for a project when Application is closing
* Fixed Linux/OSX build warnings
+ Show 2 groups of errors: "Auto-repared" and "Remaning".
+ Use different icons for volumes with/without remaining errors
+ Fixed update of the ObjectList warnings icons after switch the color mode of a PrusaSlicer
+ Some code refactoring: Use same code for tooltips for "exclamation"-icon from an ObjectList and from a Sidebar->ObjectInfo
TriangleMesh newly only holds indexed_triangle_set and
TriangleMeshStats. TriangleMeshStats contains an excerpt of stl_stats.
TriangleMeshStats are updated when initializing with indexed_triangle_set.
Admesh triangle mesh fixing is newly only used when loading an STL.
AMF / 3MF / OBJ file formats are already indexed triangle sets, thus
they are no more converted to admesh stl_file format, nor fixed
through admesh repair machinery. When importing AMF / 3MF / OBJ files,
volume is calculated and if negative, all faces are flipped. Also
a bounding box and number of open edges is calculated.
Implemented its_number_of_patches(), its_num_open_edges()
Optimized its_split(), its_is_splittable() using a visitor pattern.
Reworked QHull integration into TriangleMesh:
1) Face normals were not right.
2) Indexed triangle set is newly emitted instead of duplicating
vertices for each face.
Fixed cut_mesh(): Orient the triangulated faces correctly.
stl_stats are newly only accessed by TriangleMesh::stats(),
most of the direct access to TriangleMesh::stl is gone with the exception
of parsing input files (3MF, AMF, obj).
Exporting G-code on a worker thread did not work correctly as the worker
threads were using user's locale, not "C" locale.
The "C" locale is newly enforced to TBB worker threads by
name_tbb_thread_pool_threads_set_locale()
