make sure alert buttons are visible when windows are docked to the main window (Fixes Issue 345)
make sure alert buttons are visible when windows are docked to the main window (Fixes Issue 345)

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