Rename LabelTrack::IsSelected so it doesn't shadow Track::IsSelected

src/LabelTrack.cpp

@@ -2274,7 +2274,7 @@ void LabelTrack::Unselect()
    mSelIndex = -1;
 }
 
-bool LabelTrack::IsSelected() const
+bool LabelTrack::HasSelection() const
 {
    return (mSelIndex >= 0 && mSelIndex < (int)mLabels.size());
 }

src/LabelTrack.h

@@ -229,7 +229,8 @@ class AUDACITY_DLL_API LabelTrack final : public Track
 
    void Unselect();
 
-   bool IsSelected() const;
+   // Whether any label box is selected -- not, whether the track is selected.
+   bool HasSelection() const;
 
    int GetNumLabels() const;
    const LabelStruct *GetLabel(int index) const;

src/menus/EditMenus.cpp

@@ -38,7 +38,7 @@ bool DoPasteText(AudacityProject &project)
    for (auto pLabelTrack : tracks->Any<LabelTrack>())
    {
       // Does this track have an active label?
-      if (pLabelTrack->IsSelected()) {
+      if (pLabelTrack->HasSelection()) {
 
          // Yes, so try pasting into it
          if (pLabelTrack->PasteSelectedText(selectedRegion.t0(),

src/tracks/labeltrack/ui/LabelTextHandle.cpp

@@ -82,7 +82,7 @@ UIHandle::Result LabelTextHandle::Click
 
    mSelectedRegion = viewInfo.selectedRegion;
    pLT->HandleTextClick( event, evt.rect, viewInfo, &viewInfo.selectedRegion );
-   wxASSERT(pLT->IsSelected());
+   wxASSERT(pLT->HasSelection());
 
    {
       // IF the user clicked a label, THEN select all other tracks by Label