Fix various memory leaks on exit

Source/Editor/Viewport/MainEditorGizmoViewport.cs

@@ -1042,10 +1042,12 @@ namespace FlaxEditor.Viewport
 
             DisposeModes();
             _debugDrawData.Dispose();
-            //Object.Destroy(ref SelectionOutline);
-            //Object.Destroy(ref EditorPrimitives);
-            //Object.Destroy(ref _editorSpritesRenderer);
-            //Object.Destroy(ref _customSelectionOutline);
+            if (_task != null)
+            {
+                // Release if task is not used to save screenshot for project icon
+                Object.Destroy(ref _task);
+                ReleaseResources();
+            }
 
             base.OnDestroy();
         }
@@ -1062,7 +1064,6 @@ namespace FlaxEditor.Viewport
 
             _task = null;
             _backBuffer = null;
-            _editorSpritesRenderer = null;
         }
 
         internal void SaveProjectIconEnd()
@@ -1070,9 +1071,19 @@ namespace FlaxEditor.Viewport
             if (_savedTask)
             {
                 _savedTask.Enabled = false;
+                Object.Destroy(_savedTask);
+                ReleaseResources();
                 _savedTask = null;
             }
             Object.Destroy(ref _savedBackBuffer);
         }
+
+        private void ReleaseResources()
+        {
+            Object.Destroy(ref SelectionOutline);
+            Object.Destroy(ref EditorPrimitives);
+            Object.Destroy(ref _editorSpritesRenderer);
+            Object.Destroy(ref _customSelectionOutline);
+        }
     }
 }

Source/Engine/Core/Log.cpp

@@ -156,9 +156,9 @@ void Log::Logger::Dispose()
     WriteFloor();
 
     // Close
-    LogAfterInit = false;
     if (LogAfterInit)
     {
+        LogAfterInit = false;
         LogFile->Close();
         Delete(LogFile);
         LogFile = nullptr;

Source/Engine/Platform/Windows/WindowsFileSystemWatcher.cpp

@@ -182,6 +182,7 @@ WindowsFileSystemWatcher::~WindowsFileSystemWatcher()
         FileSystemWatchers::ThreadActive = false;
         QueueUserAPC(FileSystemWatchers::StopProc, FileSystemWatchers::Thread->GetHandle(), 0);
         FileSystemWatchers::Thread->Join();
+        Delete(FileSystemWatchers::Thread);
         FileSystemWatchers::Thread = nullptr;
     }
     FileSystemWatchers::Locker.Unlock();

Source/Engine/Scripting/Scripting.cpp

@@ -518,7 +518,7 @@ void Scripting::Release()
 
             module->Destroy(false);
         }
-        _nonNativeModules.Clear();
+        _nonNativeModules.ClearDelete();
         _hasGameModulesLoaded = false;
     }
 
@@ -619,7 +619,7 @@ void Scripting::Reload(bool canTriggerSceneReload)
         module->Destroy(true);
     }
     modules.Clear();
-    _nonNativeModules.Clear();
+    _nonNativeModules.ClearDelete();
     _hasGameModulesLoaded = false;
 
     // Give GC a try to cleanup old user objects and the other mess