Core: Refactor logging viewer

* All log categories that were ever used are captured.
* Fixed various small issues.
* Allow disabling individual logging types.
* Add Splitter between messages and categories.
* No longer needs to interpret or change QT_LOGGING_RULES.

Change-Id: I33be4754d550064bc66274f655a59e7af67ae487
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>
Reviewed-by: Christian Stenger <christian.stenger@qt.io>

src/plugins/coreplugin/coreplugin.cpp

@@ -9,18 +9,18 @@
 #include "icore.h"
 #include "idocument.h"
 #include "iwizardfactory.h"
+#include "loggingviewer.h"
 #include "modemanager.h"
 #include "session.h"
 #include "settingsdatabase.h"
 #include "themechooser.h"
 
 #include "actionmanager/actionmanager.h"
+#include "coreconstants.h"
 #include "documentmanager.h"
-#include "editormanager/editormanager.h"
+#include "fileutils.h"
 #include "find/findplugin.h"
 #include "locator/locator.h"
-#include "coreconstants.h"
-#include "fileutils.h"
 
 #include <extensionsystem/pluginerroroverview.h>
 #include <extensionsystem/pluginmanager.h>
@@ -490,6 +490,7 @@ QString CorePlugin::msgCrashpadInformation()
 
 ExtensionSystem::IPlugin::ShutdownFlag CorePlugin::aboutToShutdown()
 {
+    LoggingViewer::hideLoggingView();
     Find::aboutToShutdown();
     m_locator->aboutToShutdown();
     ICore::aboutToShutdown();