css: Use SCSS nesting for '#topics_header' in left-sidebar.scss
css: Use SCSS nesting for '#topics_header' in left-sidebar.scss

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