lightbox: Remove the unwanted scrollbar from the image list.
lightbox: Remove the unwanted scrollbar from the image list.

Fixes: #5277.

vabs22/zulip,rishig/zulip,andersk/zulip,mahim97/zulip,andersk/zulip,rishig/zulip,tommyip/zulip,dhcrzf/zulip,zulip/zulip,vaidap/zulip,brainwane/zulip,dhcrzf/zulip,brainwane/zulip,verma-varsha/zulip,verma-varsha/zulip,verma-varsha/zulip,shubhamdhama/zulip,punchagan/zulip,synicalsyntax/zulip,brockwhittaker/zulip,tommyip/zulip,eeshangarg/zulip,verma-varsha/zulip,Galexrt/zulip,jackrzhang/zulip,andersk/zulip,rishig/zulip,rishig/zulip,showell/zulip,synicalsyntax/zulip,eeshangarg/zulip,mahim97/zulip,jackrzhang/zulip,eeshangarg/zulip,hackerkid/zulip,showell/zulip,synicalsyntax/zulip,showell/zulip,jrowan/zulip,rht/zulip,synicalsyntax/zulip,punchagan/zulip,amanharitsh123/zulip,punchagan/zulip,synicalsyntax/zulip,vaidap/zulip,showell/zulip,Galexrt/zulip,kou/zulip,amanharitsh123/zulip,brainwane/zulip,dhcrzf/zulip,brockwhittaker/zulip,brainwane/zulip,rishig/zulip,vaidap/zulip,kou/zulip,mahim97/zulip,hackerkid/zulip,Galexrt/zulip,hackerkid/zulip,shubhamdhama/zulip,jackrzhang/zulip,shubhamdhama/zulip,tommyip/zulip,showell/zulip,punchagan/zulip,hackerkid/zulip,kou/zulip,brockwhittaker/zulip,jrowan/zulip,vaidap/zulip,jrowan/zulip,timabbott/zulip,Galexrt/zulip,brainwane/zulip,andersk/zulip,mahim97/zulip,rht/zulip,synicalsyntax/zulip,kou/zulip,timabbott/zulip,zulip/zulip,jackrzhang/zulip,jrowan/zulip,hackerkid/zulip,zulip/zulip,zulip/zulip,vabs22/zulip,tommyip/zulip,vabs22/zulip,rht/zulip,eeshangarg/zulip,punchagan/zulip,kou/zulip,vaidap/zulip,amanharitsh123/zulip,brainwane/zulip,showell/zulip,rht/zulip,tommyip/zulip,timabbott/zulip,shubhamdhama/zulip,andersk/zulip,andersk/zulip,brockwhittaker/zulip,vabs22/zulip,shubhamdhama/zulip,shubhamdhama/zulip,timabbott/zulip,vaidap/zulip,zulip/zulip,amanharitsh123/zulip,verma-varsha/zulip,jackrzhang/zulip,eeshangarg/zulip,jrowan/zulip,mahim97/zulip,jrowan/zulip,tommyip/zulip,timabbott/zulip,rishig/zulip,jackrzhang/zulip,dhcrzf/zulip,jackrzhang/zulip,Galexrt/zulip,vabs22/zulip,mahim97/zulip,hackerkid/zulip,amanharitsh123/zulip,rht/zulip,zulip/zulip,dhcrzf/zulip,showell/zulip,tommyip/zulip,punchagan/zulip,brainwane/zulip,verma-varsha/zulip,andersk/zulip,eeshangarg/zulip,Galexrt/zulip,rishig/zulip,kou/zulip,rht/zulip,amanharitsh123/zulip,brockwhittaker/zulip,Galexrt/zulip,timabbott/zulip,eeshangarg/zulip,brockwhittaker/zulip,synicalsyntax/zulip,zulip/zulip,punchagan/zulip,kou/zulip,rht/zulip,dhcrzf/zulip,timabbott/zulip,dhcrzf/zulip,hackerkid/zulip,vabs22/zulip,shubhamdhama/zulip