danny's version of "Turn Admin On" to resolve conflict
when giving diagnostics when failing to process a template, sometimes there is no current asset in $session->asset
toJson() method of tab and form related classes (FormBuilder, FormBuilder/Tabset,
Form/* form controls, etc) that generates a structured JSON representation of
forms.  useful for serializing dynamically constructed forms for sending them
to JS UI apps.  initial version.
local (?) changes to behavior for adding the "turn admin on" link to an existing style that has one
www_editSettings in Operation/Settings.pm sending structured JSON using the Form-JSON work's toJson() method.
needs www_saveSettings to match.
stub fromJson, get rid of the "objects" field in toJson
stub out the "Settings" admin menu
admin pop-ups (adminOverlay) overflow: visible so they don't get chopped off
make sure stuff has a 'type' in toJson, since a few places were missed
toJson, type