Update typeIDToStringID to generate $-keys

[hansottowirtz]

This fixes the generated code when type ids don't have string ids.

e.g. (from ExportColorLookupTables.jsx)

// call the grid rendering plugin to do the work
var keyRenderGrid = charIDToTypeID("3grd");
var keyDataPoints2 = charIDToTypeID('grdP');
var args = new ActionDescriptor();
args.putInteger(keyDataPoints2, points);
var result = executeActionForUXP(keyRenderGrid, args, DialogModes.NO);

would now generate:

require('photoshop').action.batchPlay([{ "_obj": "$3grd","$grdP": 32, "_options": { "dialogOptions": "dontDisplay" } }], { "synchronousExecution": true })

before, it generated:

require('photoshop').action.batchPlay([{ "_obj": "","": 32, "_options": { "dialogOptions": "dontDisplay" } }], { "synchronousExecution": true })