simulator: allow changing dec drift rate while capture is active. This helps for using the simulator with the Drift Align tool. Also, allow drift rate < 0 to simulate drift in both directions.
simulator: allow changing dec drift rate while capture is active. This helps for using the simulator with the Drift Align tool.
Also, allow drift rate < 0 to simulate drift in both directions.

simonct/phd2,olegkutkov/phd2guiding_crao,hholi/phd2,EverettQuebral/phd2,lynxdeterra/open-phd-guiding,olegkutkov/phd2guiding_crao,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,OpenPHDGuiding/phd2,hholi/phd2,eklenske/phd2,lynxdeterra/open-phd-guiding,eklenske/phd2,OpenPHDGuiding/phd2,simonct/phd2,lynxdeterra/open-phd-guiding,EverettQuebral/phd2,EverettQuebral/phd2,hholi/phd2,hholi/phd2,simonct/phd2,olegkutkov/phd2guiding_crao,simonct/phd2,olegkutkov/phd2guiding_crao,lynxdeterra/open-phd-guiding,eklenske/phd2,lynxdeterra/open-phd-guiding,EverettQuebral/phd2,OpenPHDGuiding/phd2,simonct/phd2,OpenPHDGuiding/phd2,EverettQuebral/phd2,hholi/phd2,eklenske/phd2,olegkutkov/phd2guiding_crao,olegkutkov/phd2guiding_crao,eklenske/phd2,eklenske/phd2,simonct/phd2,hholi/phd2,EverettQuebral/phd2,lynxdeterra/open-phd-guiding