left-sidebar: Remove non-clickable vertical space between topics.
left-sidebar: Remove non-clickable vertical space between topics.

Fixes #8952.

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