Improvements and cleanups for the textconfig runtime menu
- added menu item for saving configuration
- use existing cdrom runtime menu instead of hardcoded items
- some code cleanups after cdrom option changes


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12050 6c8e4198-a580-4521-a02f-c9ae86df1db9