ExtruderSequenceDialog :

Fixed layouts after the second opening of the dialog.
 (Removing any extruder from the sequence does not cause an incorrect layout)
Validation of entered values added
 (0 is not a valid value)

src/slic3r/CMakeLists.txt

@@ -146,6 +146,8 @@ set(SLIC3R_GUI_SOURCES
     Utils/OctoPrint.hpp
     Utils/Duet.cpp
     Utils/Duet.hpp
+    Utils/FlashAir.cpp
+    Utils/FlashAir.hpp
     Utils/PrintHost.cpp
     Utils/PrintHost.hpp
     Utils/Bonjour.cpp
@@ -156,6 +158,7 @@ set(SLIC3R_GUI_SOURCES
     Utils/UndoRedo.hpp
     Utils/HexFile.cpp
     Utils/HexFile.hpp
+    Utils/Thread.hpp
 )
 
 if (APPLE)