settings: Add user-id readonly field in edit-user UI.
settings: Add user-id readonly field in edit-user UI.

andersk/zulip,kou/zulip,rht/zulip,andersk/zulip,zulip/zulip,andersk/zulip,rht/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,kou/zulip,rht/zulip,eeshangarg/zulip,zulip/zulip,andersk/zulip,andersk/zulip,eeshangarg/zulip,eeshangarg/zulip,eeshangarg/zulip,kou/zulip,kou/zulip,eeshangarg/zulip,zulip/zulip,eeshangarg/zulip,rht/zulip,zulip/zulip,andersk/zulip,kou/zulip,rht/zulip,rht/zulip,kou/zulip,kou/zulip,zulip/zulip,zulip/zulip