Fixes: debugger: fix custom dumpers

    Details:  again...

src/plugins/debugger/debuggermanager.cpp

@@ -1096,8 +1096,8 @@ bool DebuggerManager::useFastStart() const
 
 void DebuggerManager::setUseCustomDumpers(bool on)
 {
-    //m_settings.m_useCustomDumpers = on;
-    //engine()->setUseCustomDumpers(on);
+    m_settings.m_useCustomDumpers = on;
+    engine()->setUseCustomDumpers(on);
 }
 
 void DebuggerManager::setUseFastStart(bool on)