Plugin sorting updates

- Add enabledPlugins for core plugins which are enabled but NOT auto-loaded (may need to be written to plugins.txt or have an ambiguous load order position)
- General Starfield updates
  - Add enabledPlugins for "BlueprintShips-Starfield.esm"
  - Disable plugin management if sTestFile is in use (also applies to FO4)
  - Write the enabledPlugins to plugins.txt to enforce base game load order
  - Allow for LOOT sorting (dynamic based on settings)
- Incorporate enabledPlugins into force enabled plugins in plugin list
- Update various interface layers

TODO: Fix sort button to dynamically update if status changes
TODO: Auto refresh lists if the INI Editor is closed

src/iplugingame.h

@@ -222,6 +222,11 @@ class IPluginGame : public QObject, public IPlugin
    */
   virtual QStringList primaryPlugins() const = 0;
 
+  /**
+   * @return list of plugins enabled by the game but not in a strict load order
+   */
+  virtual QStringList enabledPlugins() const = 0;
+
   /**
    * this function may be called before init()
    *