Feature Request: use field other then "text"

[BlakeTacklind]

I am trying to work on a wiki that makes using data tiddlers for json unwieldy. I would like to have my jsons contained in fields other then the text field. This would cause some difficulties and require some new filter functions to maintain backwards compatibility.

• For events I can see using a new paramObject that indicates which field it is suppose to read from. It would change lines like:

  TW5-JsonMangler/widgets/jsonmangler.js

  Line 100 in 7c64660

  if (tiddler && tiddler.fields.text) {

• For filters things will be a little harder but it looks like changes will have to start from here:

  TW5-JsonMangler/patchSource/core/modules/wiki.js

  Line 746 in 7c64660

  if(tiddler && tiddler.fields.text) {

• As for textRefrences the format I think could be expanded to include a field before a property index: {{title!!field##propertyIndex}}.
• To be as portable as possible, I think it could be good to have a filter operators that read json that comes from the filter iterator ie: [<tiddler(s)>indexes[]] == [<tiddler(s)>indexes:text[]]. the has operator may cause some issue here.

There are likely many other items to be thought through. But I am willing to put some time into this but I would like some input before I really start on it.