css: Use SCSS nesting in components.scss for `.simplebar-track`.
css: Use SCSS nesting in components.scss for `.simplebar-track`.

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