[FIXED JENKINS-37549] - Fixed background color for ComboBoxList (#2511)
[FIXED JENKINS-37549] - Fixed background color for ComboBoxList (#2511)

Hard to see anything with Gray background and White Text.
Style is in line with Selects and other form inputs.
(cherry picked from commit c505dec68516837a4ca90d9e5a373ecce93730ed)

protazy/jenkins,azweb76/jenkins,azweb76/jenkins,Vlatombe/jenkins,tangkun75/jenkins,DanielWeber/jenkins,fbelzunc/jenkins,Jimilian/jenkins,ikedam/jenkins,lilyJi/jenkins,Vlatombe/jenkins,pjanouse/jenkins,patbos/jenkins,damianszczepanik/jenkins,dariver/jenkins,ydubreuil/jenkins,viqueen/jenkins,lilyJi/jenkins,ydubreuil/jenkins,tangkun75/jenkins,aldaris/jenkins,alvarolobato/jenkins,protazy/jenkins,sathiya-mit/jenkins,daniel-beck/jenkins,ikedam/jenkins,FarmGeek4Life/jenkins,oleg-nenashev/jenkins,stephenc/jenkins,bpzhang/jenkins,Jochen-A-Fuerbacher/jenkins,tangkun75/jenkins,ikedam/jenkins,daniel-beck/jenkins,batmat/jenkins,gitaccountforprashant/gittest,Jimilian/jenkins,tangkun75/jenkins,protazy/jenkins,rlugojr/jenkins,andresrc/jenkins,patbos/jenkins,kohsuke/hudson,andresrc/jenkins,v1v/jenkins,viqueen/jenkins,batmat/jenkins,Ykus/jenkins,kohsuke/hudson,lilyJi/jenkins,patbos/jenkins,aldaris/jenkins,hplatou/jenkins,damianszczepanik/jenkins,sathiya-mit/jenkins,kohsuke/hudson,v1v/jenkins,Jochen-A-Fuerbacher/jenkins,amuniz/jenkins,escoem/jenkins,FarmGeek4Life/jenkins,ydubreuil/jenkins,olivergondza/jenkins,bkmeneguello/jenkins,Ykus/jenkins,daniel-beck/jenkins,kohsuke/hudson,damianszczepanik/jenkins,v1v/jenkins,DanielWeber/jenkins,Vlatombe/jenkins,bpzhang/jenkins,alvarolobato/jenkins,FarmGeek4Life/jenkins,oleg-nenashev/jenkins,rsandell/jenkins,azweb76/jenkins,MarkEWaite/jenkins,Vlatombe/jenkins,stephenc/jenkins,fbelzunc/jenkins,patbos/jenkins,gitaccountforprashant/gittest,ErikVerheul/jenkins,lilyJi/jenkins,rlugojr/jenkins,daniel-beck/jenkins,FarmGeek4Life/jenkins,wuwen5/jenkins,rsandell/jenkins,aldaris/jenkins,pjanouse/jenkins,gitaccountforprashant/gittest,viqueen/jenkins,rlugojr/jenkins,pjanouse/jenkins,escoem/jenkins,jglick/jenkins,ErikVerheul/jenkins,v1v/jenkins,wuwen5/jenkins,bkmeneguello/jenkins,ErikVerheul/jenkins,viqueen/jenkins,rsandell/jenkins,ydubreuil/jenkins,wuwen5/jenkins,rlugojr/jenkins,olivergondza/jenkins,kohsuke/hudson,bpzhang/jenkins,damianszczepanik/jenkins,MarkEWaite/jenkins,gitaccountforprashant/gittest,oleg-nenashev/jenkins,ikedam/jenkins,Jimilian/jenkins,batmat/jenkins,oleg-nenashev/jenkins,olivergondza/jenkins,Vlatombe/jenkins,DanielWeber/jenkins,Jimilian/jenkins,ydubreuil/jenkins,oleg-nenashev/jenkins,rlugojr/jenkins,damianszczepanik/jenkins,MarkEWaite/jenkins,Jimilian/jenkins,jenkinsci/jenkins,aldaris/jenkins,Ykus/jenkins,jenkinsci/jenkins,bkmeneguello/jenkins,ndeloof/jenkins,Ykus/jenkins,batmat/jenkins,ErikVerheul/jenkins,ErikVerheul/jenkins,bkmeneguello/jenkins,ndeloof/jenkins,ydubreuil/jenkins,tfennelly/jenkins,hplatou/jenkins,wuwen5/jenkins,sathiya-mit/jenkins,v1v/jenkins,rsandell/jenkins,amuniz/jenkins,jglick/jenkins,azweb76/jenkins,wuwen5/jenkins,sathiya-mit/jenkins,ajshastri/jenkins,protazy/jenkins,protazy/jenkins,tangkun75/jenkins,rsandell/jenkins,Vlatombe/jenkins,godfath3r/jenkins,fbelzunc/jenkins,kohsuke/hudson,godfath3r/jenkins,recena/jenkins,batmat/jenkins,jglick/jenkins,escoem/jenkins,amuniz/jenkins,olivergondza/jenkins,ajshastri/jenkins,FarmGeek4Life/jenkins,godfath3r/jenkins,Jochen-A-Fuerbacher/jenkins,alvarolobato/jenkins,viqueen/jenkins,alvarolobato/jenkins,aldaris/jenkins,ajshastri/jenkins,daniel-beck/jenkins,FarmGeek4Life/jenkins,dariver/jenkins,tfennelly/jenkins,v1v/jenkins,ikedam/jenkins,Ykus/jenkins,sathiya-mit/jenkins,recena/jenkins,stephenc/jenkins,daniel-beck/jenkins,Jochen-A-Fuerbacher/jenkins,dariver/jenkins,viqueen/jenkins,recena/jenkins,lilyJi/jenkins,tangkun75/jenkins,tangkun75/jenkins,damianszczepanik/jenkins,godfath3r/jenkins,tfennelly/jenkins,pjanouse/jenkins,bpzhang/jenkins,FarmGeek4Life/jenkins,bpzhang/jenkins,MarkEWaite/jenkins,MarkEWaite/jenkins,amuniz/jenkins,oleg-nenashev/jenkins,amuniz/jenkins,jglick/jenkins,alvarolobato/jenkins,azweb76/jenkins,DanielWeber/jenkins,wuwen5/jenkins,ajshastri/jenkins,fbelzunc/jenkins,jenkinsci/jenkins,daniel-beck/jenkins,hplatou/jenkins,v1v/jenkins,fbelzunc/jenkins,pjanouse/jenkins,DanielWeber/jenkins,bpzhang/jenkins,fbelzunc/jenkins,recena/jenkins,gitaccountforprashant/gittest,protazy/jenkins,rsandell/jenkins,pjanouse/jenkins,MarkEWaite/jenkins,ndeloof/jenkins,rlugojr/jenkins,bkmeneguello/jenkins,pjanouse/jenkins,ajshastri/jenkins,gitaccountforprashant/gittest,batmat/jenkins,dariver/jenkins,olivergondza/jenkins,Ykus/jenkins,bkmeneguello/jenkins,Vlatombe/jenkins,dariver/jenkins,gitaccountforprashant/gittest,patbos/jenkins,ErikVerheul/jenkins,jenkinsci/jenkins,ikedam/jenkins,rsandell/jenkins,escoem/jenkins,ajshastri/jenkins,godfath3r/jenkins,andresrc/jenkins,alvarolobato/jenkins,bkmeneguello/jenkins,Jochen-A-Fuerbacher/jenkins,rlugojr/jenkins,ndeloof/jenkins,tfennelly/jenkins,olivergondza/jenkins,ikedam/jenkins,batmat/jenkins,godfath3r/jenkins,amuniz/jenkins,stephenc/jenkins,andresrc/jenkins,bpzhang/jenkins,escoem/jenkins,ajshastri/jenkins,amuniz/jenkins,stephenc/jenkins,oleg-nenashev/jenkins,ikedam/jenkins,DanielWeber/jenkins,dariver/jenkins,tfennelly/jenkins,aldaris/jenkins,ndeloof/jenkins,azweb76/jenkins,ErikVerheul/jenkins,Jimilian/jenkins,patbos/jenkins,hplatou/jenkins,andresrc/jenkins,damianszczepanik/jenkins,Jochen-A-Fuerbacher/jenkins,godfath3r/jenkins,recena/jenkins,tfennelly/jenkins,viqueen/jenkins,azweb76/jenkins,kohsuke/hudson,ndeloof/jenkins,dariver/jenkins,stephenc/jenkins,patbos/jenkins,jglick/jenkins,sathiya-mit/jenkins,jenkinsci/jenkins,andresrc/jenkins,protazy/jenkins,tfennelly/jenkins,lilyJi/jenkins,recena/jenkins,stephenc/jenkins,lilyJi/jenkins,MarkEWaite/jenkins,hplatou/jenkins,olivergondza/jenkins,hplatou/jenkins,ndeloof/jenkins,Jochen-A-Fuerbacher/jenkins,Ykus/jenkins,fbelzunc/jenkins,andresrc/jenkins,daniel-beck/jenkins,jenkinsci/jenkins,sathiya-mit/jenkins,jenkinsci/jenkins,jglick/jenkins,escoem/jenkins,kohsuke/hudson,ydubreuil/jenkins,hplatou/jenkins,escoem/jenkins,MarkEWaite/jenkins,aldaris/jenkins,jenkinsci/jenkins,damianszczepanik/jenkins,wuwen5/jenkins,rsandell/jenkins,jglick/jenkins,alvarolobato/jenkins,Jimilian/jenkins,recena/jenkins,DanielWeber/jenkins