cut WindowAccessible, PopupMenuTable, LinkingHtmlWindow from .h files

src/FFmpeg.h

@@ -150,7 +150,6 @@ extern "C" {
 
 /* rather earlier than normal, but pulls in config*.h and other program stuff
  * we need for the next bit */
-#include "widgets/LinkingHtmlWindow.h"
 #include "ShuttleGui.h"
 #include "Prefs.h"
 

src/effects/Equalization.cpp

@@ -107,6 +107,10 @@
 #include "../AllThemeResources.h"
 #include "../float_cast.h"
 
+#if wxUSE_ACCESSIBILITY
+#include "../widgets/WindowAccessible.h"
+#endif
+
 #include "FileDialog.h"
 
 #ifdef EXPERIMENTAL_EQ_SSE_THREADED

src/effects/Equalization.h

@@ -19,10 +19,6 @@
 
 #include <wx/setup.h> // for wxUSE_* macros
 
-#if wxUSE_ACCESSIBILITY
-#include "../widgets/WindowAccessible.h"
-#endif
-
 #include "Effect.h"
 #include "../xml/XMLTagHandler.h"
 #include "../widgets/Grid.h"

src/tracks/ui/TrackButtonHandles.h

@@ -93,8 +93,6 @@ public:
 
 ////////////////////////////////////////////////////////////////////////////////
 
-#include "../../widgets/PopupMenuTable.h"
-
 class MenuButtonHandle final : public ButtonHandle
 {
    MenuButtonHandle(const MenuButtonHandle&) = delete;

src/tracks/ui/TrackControls.cpp

@@ -25,6 +25,7 @@ Paul Licameli split from TrackPanel.cpp
 #include "../../commands/Command.h"
 #include "../../commands/CommandManager.h"
 #include "../../ShuttleGui.h"
+#include "../../widgets/PopupMenuTable.h"
 
 
 TrackControls::TrackControls( std::shared_ptr<Track> pTrack )