Fix bug with camera selection when there are multiple cameras of the same type - camera Ids always being appended to, not cleared.
Fix bug with camera selection when there are multiple cameras of the same type - camera Ids always being appended to, not cleared.

EverettQuebral/phd2,OpenPHDGuiding/phd2,hholi/phd2,simonct/phd2,OpenPHDGuiding/phd2,EverettQuebral/phd2,olegkutkov/phd2guiding_crao,EverettQuebral/phd2,hholi/phd2,simonct/phd2,OpenPHDGuiding/phd2,EverettQuebral/phd2,OpenPHDGuiding/phd2,olegkutkov/phd2guiding_crao,olegkutkov/phd2guiding_crao,simonct/phd2,simonct/phd2,EverettQuebral/phd2,olegkutkov/phd2guiding_crao,OpenPHDGuiding/phd2,olegkutkov/phd2guiding_crao,olegkutkov/phd2guiding_crao,hholi/phd2,EverettQuebral/phd2,hholi/phd2,simonct/phd2,simonct/phd2,hholi/phd2,hholi/phd2,OpenPHDGuiding/phd2