stream_data: Fix traceback with opening the compose box.
stream_data: Fix traceback with opening the compose box.

We need to call update_calculated_fields earlier since we
use can_access_subscribers in user_is_subscribed.

kou/zulip,tommyip/zulip,eeshangarg/zulip,timabbott/zulip,andersk/zulip,shubhamdhama/zulip,tommyip/zulip,rht/zulip,brainwane/zulip,timabbott/zulip,kou/zulip,hackerkid/zulip,zulip/zulip,shubhamdhama/zulip,rht/zulip,jackrzhang/zulip,jackrzhang/zulip,zulip/zulip,brainwane/zulip,punchagan/zulip,synicalsyntax/zulip,andersk/zulip,eeshangarg/zulip,tommyip/zulip,kou/zulip,brainwane/zulip,showell/zulip,rht/zulip,timabbott/zulip,rishig/zulip,synicalsyntax/zulip,rht/zulip,brainwane/zulip,eeshangarg/zulip,rishig/zulip,timabbott/zulip,tommyip/zulip,rishig/zulip,showell/zulip,dhcrzf/zulip,punchagan/zulip,brainwane/zulip,eeshangarg/zulip,synicalsyntax/zulip,zulip/zulip,punchagan/zulip,hackerkid/zulip,jackrzhang/zulip,brainwane/zulip,andersk/zulip,showell/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,dhcrzf/zulip,zulip/zulip,shubhamdhama/zulip,timabbott/zulip,zulip/zulip,jackrzhang/zulip,hackerkid/zulip,hackerkid/zulip,tommyip/zulip,tommyip/zulip,zulip/zulip,showell/zulip,kou/zulip,rishig/zulip,showell/zulip,dhcrzf/zulip,shubhamdhama/zulip,rishig/zulip,synicalsyntax/zulip,hackerkid/zulip,hackerkid/zulip,dhcrzf/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,timabbott/zulip,shubhamdhama/zulip,andersk/zulip,dhcrzf/zulip,punchagan/zulip,punchagan/zulip,dhcrzf/zulip,jackrzhang/zulip,kou/zulip,showell/zulip,synicalsyntax/zulip,shubhamdhama/zulip,rht/zulip,shubhamdhama/zulip,synicalsyntax/zulip,rishig/zulip,rht/zulip,rishig/zulip,zulip/zulip,punchagan/zulip,andersk/zulip,showell/zulip,tommyip/zulip,rht/zulip,eeshangarg/zulip,andersk/zulip,timabbott/zulip,brainwane/zulip,punchagan/zulip,synicalsyntax/zulip,dhcrzf/zulip,jackrzhang/zulip,jackrzhang/zulip