Fix PluginView to handle dependencies when disabling plugins

Reviewed-by: con

src/libs/extensionsystem/pluginmanager.h

@@ -91,6 +91,7 @@ public:
     }
 
     // Plugin operations
+    QList<PluginSpec *> loadQueue();
     void loadPlugins();
     QStringList pluginPaths() const;
     void setPluginPaths(const QStringList &paths);