node tests: Fix recent build break.
node tests: Fix recent build break.

This is a one-line fix for the new CSS class
we're using for "away".

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