css: Use SCSS nesting for `.app.help` in portico.scss.
css: Use SCSS nesting for `.app.help` in portico.scss.

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