css: Use SCSS nesting in portico-signin.scss for `.register-form`.
css: Use SCSS nesting in portico-signin.scss for `.register-form`.
shubhamdhama/zulip,andersk/zulip,shubhamdhama/zulip,timabbott/zulip,brainwane/zulip,synicalsyntax/zulip,shubhamdhama/zulip,eeshangarg/zulip,punchagan/zulip,andersk/zulip,timabbott/zulip,hackerkid/zulip,showell/zulip,brainwane/zulip,punchagan/zulip,kou/zulip,showell/zulip,hackerkid/zulip,hackerkid/zulip,kou/zulip,rht/zulip,rht/zulip,showell/zulip,kou/zulip,shubhamdhama/zulip,hackerkid/zulip,zulip/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,punchagan/zulip,brainwane/zulip,andersk/zulip,rht/zulip,showell/zulip,punchagan/zulip,timabbott/zulip,hackerkid/zulip,andersk/zulip,showell/zulip,shubhamdhama/zulip,zulip/zulip,andersk/zulip,zulip/zulip,kou/zulip,eeshangarg/zulip,eeshangarg/zulip,punchagan/zulip,timabbott/zulip,synicalsyntax/zulip,rht/zulip,punchagan/zulip,timabbott/zulip,timabbott/zulip,synicalsyntax/zulip,shubhamdhama/zulip,hackerkid/zulip,brainwane/zulip,punchagan/zulip,zulip/zulip,kou/zulip,eeshangarg/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,shubhamdhama/zulip,brainwane/zulip,eeshangarg/zulip,showell/zulip,zulip/zulip,timabbott/zulip,andersk/zulip,synicalsyntax/zulip,andersk/zulip,synicalsyntax/zulip,brainwane/zulip,zulip/zulip,eeshangarg/zulip,hackerkid/zulip,synicalsyntax/zulip,showell/zulip,rht/zulip,kou/zulip,brainwane/zulip