Consider Item Object Display Enhancements

[vijayiyer05]

• Stimulus template variable ordering
• Consider linked file direct/derived property group separation
• Consider general rules for including some item information among core properties (e.g. the "least unique" item info values or the "fully redundant" values stored in info table properties)
• Consider to add a show methods link to item object custom display footer (where there are available public methods)

[vijayiyer05]

Completed first item as of 0f12193.

Defer additional items to future release.

[vijayiyer05]

One idea that came out of the summer project might be that it may make more sense to group the properties after LinkedItems by "physiology", "behavior", and "metadata" matching groups defined by the data resource, rather than the current grouping (direct, derived, linked file 1 direct/derived, linked file 2 direct/derived, etc...).

As noted in earlier comment: I suggest deferring remainder of this Issue to future cycle. Just capturing ideas for now.