poll_widget: Convert votes from object to Map.
poll_widget: Convert votes from object to Map.

Fixes implicity stringification of the user ID keys.

Signed-off-by: Anders Kaseorg <dfdb7392591db597bc41cf266a9c3bc12a2706e5@zulipchat.com>

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