popovers: Remove broken code with 'u" key.
popovers: Remove broken code with 'u" key.

The code that was removed here wasn't doing what it
was intending to do, and we really just want to pop
up the user menu above the currently selected message.

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