Revert "Merge pull request #4286 from shuffle2/Aestek-clean-osd"

This reverts commit 5c0fa4db4f, reversing
changes made to b8731eb818.

Source/Core/Core/Core.cpp

@@ -173,6 +173,13 @@ void DisplayMessage(const std::string& message, int time_in_ms)
   if (!IsRunning())
     return;
 
+  // Actually displaying non-ASCII could cause things to go pear-shaped
+  for (const char& c : message)
+  {
+    if (!std::isprint(c))
+      return;
+  }
+
   OSD::AddMessage(message, time_in_ms);
   Host_UpdateTitle(message);
 }