Some wxWidgets fixes
- Fixed ParamDialog::isGeneratediD() (browse button of last item could fail)
- Disable menu items without runtime options
- Partial whitespace cleanup


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@11964 6c8e4198-a580-4521-a02f-c9ae86df1db9