Merge pull request #136 from ModOrganizer2/overlay_support

Add isOverlayFlagged to IPluginList

src/ipluginlist.h

@@ -202,6 +202,16 @@ class IPluginList
    * @note in gamebryo games, a light file will usually have a .esl file
    */
   virtual bool isLightFlagged(const QString& name) const = 0;
+
+  /**
+   * @brief determine if a plugin is flagged as an overlay
+   * @param name filename of the plugin (without path but with file extension)
+   * @return true if the file is flagged as overlay, false if it isn't OR if the file
+   * doesn't exist.
+   * @note this plugin flag was added in Starfield and signifies plugin records that
+   * update existing records
+   */
+  virtual bool isOverlayFlagged(const QString& name) const = 0;
 };
 
 }  // namespace MOBase