account_settings: Change the position of the custom-profile-fields-form.
account_settings: Change the position of the custom-profile-fields-form.

The custom-profile-fields-form element custom_user_field contains
the textarea for Biography that expands. The textarea treats the
user-avatar-section as an disturbing obstacle when expanded beyond
the certain width. To fix this, the custom-profile-fields-form
is placed out from the account-settings-form.

Fixes #17617.

hackerkid/zulip,hackerkid/zulip,eeshangarg/zulip,kou/zulip,zulip/zulip,rht/zulip,punchagan/zulip,zulip/zulip,punchagan/zulip,zulip/zulip,rht/zulip,punchagan/zulip,rht/zulip,hackerkid/zulip,punchagan/zulip,eeshangarg/zulip,kou/zulip,rht/zulip,kou/zulip,zulip/zulip,andersk/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,hackerkid/zulip,punchagan/zulip,rht/zulip,kou/zulip,hackerkid/zulip,rht/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,punchagan/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,eeshangarg/zulip,andersk/zulip,andersk/zulip,hackerkid/zulip,punchagan/zulip,andersk/zulip,kou/zulip,eeshangarg/zulip,zulip/zulip,kou/zulip