Remove another use of non-argv wxExecute

(Fixes supplied by mwielgus.)

common/launch_ext.cpp

@@ -25,7 +25,8 @@
 void LaunchExternal( const wxString& aPath )
 {
 #ifdef __WXMAC__
-    wxExecute( wxString::Format( "open \"%s\"", aPath ) );
+    const wchar_t* args[] = { L"open", L"--args", aPath.wc_str() };
+    wxExecute( const_cast<wchar_t**>( args ) );
 #else
     wxString path( aPath );
 

kicad/tools/kicad_manager_control.cpp

@@ -790,9 +790,9 @@ int KICAD_MANAGER_CONTROL::Execute( const TOOL_EVENT& aEvent )
         m_frame->PrintMsg( msg );
 
 #ifdef __WXMAC__
-        // Use concatenation to avoid double-quote bug in wxWidgets 3.1.5 OSX.
-        wxExecute( "osascript -e 'activate application \""
-                    + EscapeString( execFile, CTX_QUOTED_STR ) + "\"' " );
+        // This non-parameterized use of wxExecute is fine because execFile is not derived
+        // from user input.
+        wxExecute( "osascript -e 'activate application \"" + execFile + "\"'" );
 #endif
     }
     else