Remove WaveTrack.h from other headers

src/TrackPanel.h

@@ -23,10 +23,11 @@
 #include "Experimental.h"
 #include "Sequence.h"  //Stm: included for the sampleCount declaration
 #include "WaveClip.h"
-#include "WaveTrack.h"
 #include "UndoManager.h" //JKC: Included for PUSH_XXX definitions.
 #include "widgets/NumericTextCtrl.h"
 
+#include "WaveTrackLocation.h"
+
 class wxMenu;
 class wxRect;
 
@@ -47,6 +48,8 @@ class TrackPanelAx;
 
 class ViewInfo;
 
+class WaveTrack;
+
 WX_DEFINE_ARRAY(LWSlider *, LWSliderArray);
 
 class AUDACITY_DLL_API TrackClip
@@ -643,7 +646,7 @@ protected:
    WaveClip *mCapturedClip;
    TrackClipArray mCapturedClipArray;
    bool mCapturedClipIsSelection;
-   WaveTrack::Location mCapturedTrackLocation;
+   WaveTrackLocation mCapturedTrackLocation;
    wxRect mCapturedTrackLocationRect;
    wxRect mCapturedRect;