Theme does not depend on GUIPrefs...

...breaks cycle of 6, still Theme in a cycle with ImageManipulation

src/Theme.cpp

@@ -77,7 +77,6 @@ can't be.
 #include "Prefs.h"
 #include "ImageManipulation.h"
 #include "Internat.h"
-#include "prefs/GUIPrefs.h"
 #include "widgets/AudacityMessageBox.h"
 
 // JKC: First get the MAC specific images.
@@ -1299,4 +1298,39 @@ void auStaticText::OnPaint(wxPaintEvent & WXUNUSED(evt))
    dc.DrawText( GetLabel(), 0,0);
 }
 
+constexpr int defaultTheme =
+#ifdef EXPERIMENTAL_DA
+   2 // "dark"
+#else
+   1 // "light"
+#endif
+;
+
+ChoiceSetting GUITheme{
+   wxT("/GUI/Theme"),
+   {
+      ByColumns,
+      {
+         /* i18n-hint: describing the "classic" or traditional
+            appearance of older versions of Audacity */
+         XO("Classic")  ,
+         /* i18n-hint: Light meaning opposite of dark */
+         XO("Light")  ,
+         XO("Dark")  ,
+         /* i18n-hint: greater difference between foreground and
+            background colors */
+         XO("High Contrast")  ,
+         /* i18n-hint: user defined */
+         XO("Custom")  ,
+      },
+      {
+         wxT("classic")  ,
+         wxT("light")  ,
+         wxT("dark")  ,
+         wxT("high-contrast")  ,
+         wxT("custom")  ,
+      }
+   },
+   defaultTheme
+};