zjquery: Add a selector attribute to our wrapped elements.
zjquery: Add a selector attribute to our wrapped elements.

We might as well have this for debugging purposes and to simplify
the code that happens when we double-wrap DOM elements.

timabbott/zulip,jackrzhang/zulip,showell/zulip,dhcrzf/zulip,rht/zulip,zulip/zulip,eeshangarg/zulip,tommyip/zulip,zulip/zulip,kou/zulip,dhcrzf/zulip,jackrzhang/zulip,andersk/zulip,eeshangarg/zulip,rht/zulip,timabbott/zulip,dhcrzf/zulip,jackrzhang/zulip,timabbott/zulip,showell/zulip,rht/zulip,showell/zulip,synicalsyntax/zulip,showell/zulip,timabbott/zulip,tommyip/zulip,eeshangarg/zulip,rishig/zulip,tommyip/zulip,eeshangarg/zulip,andersk/zulip,tommyip/zulip,dhcrzf/zulip,hackerkid/zulip,brainwane/zulip,hackerkid/zulip,jackrzhang/zulip,zulip/zulip,hackerkid/zulip,rht/zulip,rishig/zulip,tommyip/zulip,kou/zulip,showell/zulip,eeshangarg/zulip,rishig/zulip,timabbott/zulip,showell/zulip,zulip/zulip,dhcrzf/zulip,shubhamdhama/zulip,kou/zulip,andersk/zulip,dhcrzf/zulip,punchagan/zulip,eeshangarg/zulip,kou/zulip,kou/zulip,synicalsyntax/zulip,hackerkid/zulip,jackrzhang/zulip,andersk/zulip,shubhamdhama/zulip,shubhamdhama/zulip,eeshangarg/zulip,punchagan/zulip,rht/zulip,timabbott/zulip,shubhamdhama/zulip,andersk/zulip,brainwane/zulip,jackrzhang/zulip,punchagan/zulip,punchagan/zulip,hackerkid/zulip,synicalsyntax/zulip,showell/zulip,synicalsyntax/zulip,brainwane/zulip,punchagan/zulip,zulip/zulip,andersk/zulip,tommyip/zulip,rishig/zulip,andersk/zulip,punchagan/zulip,brainwane/zulip,shubhamdhama/zulip,synicalsyntax/zulip,kou/zulip,rishig/zulip,rishig/zulip,brainwane/zulip,brainwane/zulip,punchagan/zulip,tommyip/zulip,rishig/zulip,synicalsyntax/zulip,dhcrzf/zulip,shubhamdhama/zulip,shubhamdhama/zulip,hackerkid/zulip,synicalsyntax/zulip,kou/zulip,timabbott/zulip,rht/zulip,rht/zulip,brainwane/zulip,hackerkid/zulip,zulip/zulip,jackrzhang/zulip,zulip/zulip