custom fields: Update create-field UI for default external account fields.
custom fields: Update create-field UI for default external account fields.

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