buddy list: Shrink #user_presences to 95% width.
buddy list: Shrink #user_presences to 95% width.

This fixes annoying problems where the scrollbar at the right of the
buddy list looks bad where it overlaps the buddy list.

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