Most important:
Change Download dialog to select path there.
Every user query triggers new download of version file, possibly stops former download (with dialog).
Some functions refactored.
* MSW specific: First implementation of the Notebook control to support Dark/Light color modes
* MSW specific: Set mode sizer to the Notebook control.
* MSW specific: Added icons to the Notepad control
+ There is no need to restart application after the changing of the color mode
* Fixed non-MSW build
* Updated color for SavePresetDialog
+ Added wrapper to wxMessageBox for mom-MSW platforms
Errors in the file output templates are reported in mono-spaced font,
so that the arrow character ^ is displayed at the right column
pointing to the offending spot.
The wxString saga continues. wxWidgets 3.0 don't have the wxString::FromUTF8(const std::string&) overload, we must use the GUI::from_u8 helper
Also wxWidgets 3.0 don't allow to disable wxString->const char* conversion, so calling show_info(wxWindow*, wxString, const char*) was ambiguous
Several includes moved around
Fixed return type of std::string translate_utf8() with context
(incorrectly returned wxString, should return std::string).
Fixed double translation of BackgroundSlicingProcess::validate() in Plater.
Added synchronization of GCodePreviewData between the front end / back end
(GCodePreview data is only used if PrintStep psGCodeExport is finished).
Added reset of GCodePreviewData on Print::apply() to conserve RAM.
Removed libslic3r from the default include paths for all modules but
libslic3r. Now headers from libslic3r need to be included with an
explicit path (libslic3r/libslic3r.h etc)
Split the localization macros into I18N.{cpp,h}
replaced Print & SLAPrint pointers with BackgroundProcessing pointer
at the GLCanvas3D level, so that the Print & SLAPrint access will be
synchronized with the current printer technology.
