[KBM] Refactor KBM's thread safety logic to avoid mutex re-entrancy bugs and improve performance (#6803)

* Unlock mutex before ResetModifierForLowerLevelKeyHandlers method to avoid crash if two instances of KBM are running

* Added alias for Shortcut DWORD variant to clean up code

* Removed mutex usage in single key remap method and added GetSingleKeyRemap

* Added more alias

* Moved to boolean disable remapping

* Added missing ! in condition

* Remove lock statement from bad auto-merge

src/modules/keyboardmanager/common/Shortcut.h

@@ -171,6 +171,7 @@ public:
     KeyboardManagerHelper::ErrorType IsShortcutIllegal() const;
 };
 
-using RemapBufferItem = std::vector<std::variant<DWORD, Shortcut>>;
+using KeyShortcutUnion = std::variant<DWORD, Shortcut>;
+using RemapBufferItem = std::vector<KeyShortcutUnion>;
 using RemapBufferRow = std::pair<RemapBufferItem, std::wstring>;
 using RemapBuffer = std::vector<RemapBufferRow>;