Adding the ability to load 'non-recognised' modules, with a warning to the user (the main point).

Removing duplicate code from LoadModules, at the expense of making  ModuleManager::Initialize more monolithic.

Make MultiDialog a bit more general.

Remove a few warnings.

Some logging has been turned back on when loading libs, we could turn it off again.

To test you could compile mod-nyq-bench and make sure it is available on the bottom of the 'View' menu, then unselect it in the Prefs -> Modules an retry.

src/AudacityApp.cpp

@@ -1128,14 +1128,11 @@ bool AudacityApp::OnInit()
    wxFrame *temporarywindow = new wxFrame(NULL, -1, wxT("temporarytopwindow"));
    SetTopWindow(temporarywindow);
 
-   // Initialize the ModuleManager
-   ModuleManager::Initialize();
-
    // Initialize the CommandHandler
    InitCommandHandler();
 
-   // load audacity plug-in modules
-   LoadModules(*mCmdHandler);
+   // Initialize the ModuleManager, including loading found modules
+   ModuleManager::Initialize(*mCmdHandler);
 
    // Locale
    // wxWidgets 2.3 has a much nicer wxLocale API.  We can make this code much