Fixed crash when using -noload to disable multiple plugins

The noload behavior is also changed: it now always shows the plugins in
About Plugins... menu, even though -noload was used. When using -noload,
the enabled state of the plugin is not saved, so if the command line
arg is removed, the plugin will be loaded normally.

Reviewed-by: con

src/libs/extensionsystem/pluginmanager_p.h

@@ -71,7 +71,7 @@ public:
     void profilingReport(const char *what, const PluginSpec *spec = 0);
     void loadSettings();
     void writeSettings();
-    void removePluginSpec(PluginSpec *spec);
+    void disablePluginIndirectly(PluginSpec *spec);
 
     QHash<QString, PluginCollection *> pluginCategories;
     QList<PluginSpec *> pluginSpecs;