popovers: Fix missing string-to-integer conversion.
popovers: Fix missing string-to-integer conversion.

Found looking at browser exceptions.

shubhamdhama/zulip,brainwane/zulip,shubhamdhama/zulip,zulip/zulip,hackerkid/zulip,showell/zulip,kou/zulip,eeshangarg/zulip,hackerkid/zulip,brainwane/zulip,eeshangarg/zulip,shubhamdhama/zulip,punchagan/zulip,synicalsyntax/zulip,rht/zulip,synicalsyntax/zulip,zulip/zulip,hackerkid/zulip,eeshangarg/zulip,eeshangarg/zulip,andersk/zulip,eeshangarg/zulip,punchagan/zulip,timabbott/zulip,brainwane/zulip,showell/zulip,synicalsyntax/zulip,showell/zulip,zulip/zulip,showell/zulip,shubhamdhama/zulip,shubhamdhama/zulip,timabbott/zulip,rht/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,andersk/zulip,rht/zulip,timabbott/zulip,punchagan/zulip,brainwane/zulip,kou/zulip,timabbott/zulip,rht/zulip,hackerkid/zulip,kou/zulip,timabbott/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,synicalsyntax/zulip,zulip/zulip,showell/zulip,rht/zulip,punchagan/zulip,showell/zulip,shubhamdhama/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,hackerkid/zulip,rht/zulip,brainwane/zulip,synicalsyntax/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,kou/zulip,zulip/zulip,shubhamdhama/zulip,andersk/zulip,punchagan/zulip,kou/zulip,hackerkid/zulip,kou/zulip,timabbott/zulip,kou/zulip,timabbott/zulip,andersk/zulip,brainwane/zulip,synicalsyntax/zulip,eeshangarg/zulip