Improve the performance and usability of the raw FSD message display

* Replaced QListView with QPlainTextEdit
* Added filter options for packet type and text
* Option to globally disable/enable the feature. Default disabled

Maniphest Tasks: Ref T240

src/blackcore/vatsim/networkvatlib.h

@@ -260,6 +260,7 @@ namespace BlackCore
 
             BlackMisc::CSettingReadOnly<BlackCore::Vatsim::TRawFsdMessageSetting> m_fsdMessageSetting { this, &CNetworkVatlib::fsdMessageSettingsChanged };
             QFile m_rawFsdMessageLogFile;
+            bool m_rawFsdMessagesEnabled = false;
         };
     } //namespace
 } //namespace