Uses of TranslatableString as value of XO macro...

... It is not implicitly convertible from wxString, compelling many uses of
the new type to fix compilation.

src/toolbars/ControlToolBar.cpp

@@ -92,7 +92,7 @@ BEGIN_EVENT_TABLE(ControlToolBar, ToolBar)
    EVT_IDLE(ControlToolBar::OnIdle)
 END_EVENT_TABLE()
 
-static const wxString
+static const TranslatableString
      sStatePlay = XO("Playing")
    , sStateStop = XO("Stopped")
    , sStateRecord = XO("Recording")
@@ -712,9 +712,9 @@ wxString ControlToolBar::StateForStatusBar()
    auto pProject = &mProject;
    auto scrubState = pProject
       ? Scrubber::Get( *pProject ).GetUntranslatedStateString()
-      : wxString();
+      : TranslatableString{};
    if (!scrubState.empty())
-      state = wxGetTranslation(scrubState);
+      state = scrubState.Translation();
    else if (mPlay->IsDown())
       state = wxGetTranslation(sStatePlay);
    else if (projectAudioManager.Recording())

src/toolbars/EditToolBar.cpp

@@ -226,7 +226,7 @@ void EditToolBar::EnableDisableButtons()
 static const struct Entry {
    int tool;
    CommandID commandName;
-   wxString untranslatedLabel;
+   TranslatableString untranslatedLabel;
 } EditToolbarButtonList[] = {
    { ETBCutID,      wxT("Cut"),         XO("Cut")  },
    { ETBCopyID,     wxT("Copy"),        XO("Copy")  },

src/toolbars/ToolsToolBar.cpp

@@ -142,7 +142,7 @@ void ToolsToolBar::RegenerateTooltips()
    static const struct Entry {
       int tool;
       CommandID commandName;
-      wxString untranslatedLabel;
+      TranslatableString untranslatedLabel;
    } table[] = {
       { selectTool,   wxT("SelectTool"),    XO("Selection Tool")  },
       { envelopeTool, wxT("EnvelopeTool"),  XO("Envelope Tool")   },

src/toolbars/TranscriptionToolBar.cpp

@@ -336,9 +336,9 @@ void TranscriptionToolBar::RegenerateTooltips()
    static const struct Entry {
       int tool;
       CommandID commandName;
-      wxString untranslatedLabel;
+      TranslatableString untranslatedLabel;
       CommandID commandName2;
-      wxString untranslatedLabel2;
+      TranslatableString untranslatedLabel2;
    } table[] = {
       { TTB_PlaySpeed,   wxT("PlayAtSpeed"),    XO("Play-at-Speed"),
       wxT("PlayAtSpeedLooped"),    XO("Looped-Play-at-Speed")