Add Missing Includes Across src/slic3r/GUI

Every GUI source and header now directly includes the headers declaring what it uses, rather than relying on the precompiled header or transitive includes. Generated with clang-tidy misc-include-cleaner, plus one hand edit making CalibrationPanel.hpp self-contained.

src/slic3r/GUI/BaseTransparentDPIFrame.cpp

@@ -1,7 +1,14 @@
 #include "BaseTransparentDPIFrame.hpp"
 
+#include "slic3r/GUI/GUI_Utils.hpp"
+#include "slic3r/GUI/Widgets/StateColor.hpp"
+#include "slic3r/GUI/wxExtensions.hpp"
+#include "slic3r/GUI/Widgets/Label.hpp"
+#include "slic3r/GUI/Event.hpp"
 #include <thread>
+#include <wx/dcclient.h>
 #include <wx/event.h>
+#include <wx/gdicmn.h>
 #include <wx/sizer.h>
 #include <wx/slider.h>
 #include <wx/dcmemory.h>
@@ -14,6 +21,9 @@
 #include "Widgets/TextInput.hpp"
 #include "Notebook.hpp"
 #include <chrono>
+#include <wx/string.h>
+#include <wx/toplevel.h>
+#include <wx/timer.h>
 #include "Widgets/Button.hpp"
 #include "Widgets/CheckBox.hpp"
 #include "CapsuleButton.hpp"