Simplified floppy parameter handling
wx floppy dialog now forces a media change by clicking OK (same as win32dialog)
wxdialog.cc: one more whitespace cleanup
wxdialog.h: removed unused members


git-svn-id: svn://svn.code.sf.net/p/bochs/code/trunk@12008 6c8e4198-a580-4521-a02f-c9ae86df1db9