Bug 2807 - Error message for a failed import of malforned MP3 lacks a "?" help button

src/import/ImportMP3.cpp

@@ -32,6 +32,7 @@
 
 #include "Import.h"
 #include "ImportPlugin.h"
+#include "../widgets/ErrorDialog.h"
 #include "../Project.h"
 
 #define DESC XO("MP3 files")
@@ -1097,8 +1098,11 @@ enum mad_flow MP3ImportFileHandle::ErrorCB(struct mad_stream *stream,
    }
 
    // Let the user know about the error
-   AudacityMessageBox(XO("Import failed\n\nThis is likely caused by a malformed MP3.\n\n"));
-
+   ShowErrorDialog(
+      nullptr,
+      AudacityMessageBoxCaptionStr(),
+      XO("Import failed\n\nThis is likely caused by a malformed MP3.\n\n"), 
+      "Opening_malformed_MP3_files");
    return MAD_FLOW_BREAK;
 }