Sticky -alsa option prevents jack as default

[agraef]

See rev. 6088c35. The -alsa -alsaadd pulse options in the launch script prevent setting the audio api to jack in the preferences to take effect on startup. The solution is simple: Move those options to the flags setting in the default.settings file, so that the user can remove them if wanted.

[ssssam]

Hello! Seems like a good idea -- i havent been working on this recently but would be happy to merge a PR

[agraef]

Hi Sam! I think that #96 should do the trick. Tested on a PC running Arch, seems to work as intended there.

[ssssam]

I think I did this because I was having problems with JACK and wanted something that "just works". But it's better to allow folk to override, indeed