Fix bug when un-starring a source that hasn't been starred
Fix bug when un-starring a source that hasn't been starred

jaseg/securedrop,jeann2013/securedrop,GabeIsman/securedrop,heartsucker/securedrop,heartsucker/securedrop,jeann2013/securedrop,jrosco/securedrop,jeann2013/securedrop,jaseg/securedrop,garrettr/securedrop,heartsucker/securedrop,ageis/securedrop,kelcecil/securedrop,jeann2013/securedrop,kelcecil/securedrop,micahflee/securedrop,chadmiller/securedrop,harlo/securedrop,jrosco/securedrop,jrosco/securedrop,kelcecil/securedrop,pwplus/securedrop,ageis/securedrop,jaseg/securedrop,pwplus/securedrop,micahflee/securedrop,harlo/securedrop,pwplus/securedrop,harlo/securedrop,ehartsuyker/securedrop,GabeIsman/securedrop,conorsch/securedrop,chadmiller/securedrop,jrosco/securedrop,micahflee/securedrop,ehartsuyker/securedrop,jrosco/securedrop,chadmiller/securedrop,conorsch/securedrop,garrettr/securedrop,ehartsuyker/securedrop,chadmiller/securedrop,micahflee/securedrop,jaseg/securedrop,GabeIsman/securedrop,heartsucker/securedrop,conorsch/securedrop,harlo/securedrop,jeann2013/securedrop,GabeIsman/securedrop,ehartsuyker/securedrop,jaseg/securedrop,garrettr/securedrop,jrosco/securedrop,jaseg/securedrop,pwplus/securedrop,conorsch/securedrop,pwplus/securedrop,ehartsuyker/securedrop,harlo/securedrop,conorsch/securedrop,ehartsuyker/securedrop,jeann2013/securedrop,heartsucker/securedrop,pwplus/securedrop,ageis/securedrop,ageis/securedrop,harlo/securedrop,garrettr/securedrop,GabeIsman/securedrop,chadmiller/securedrop,chadmiller/securedrop,GabeIsman/securedrop,kelcecil/securedrop,kelcecil/securedrop,kelcecil/securedrop