Dijit: standardize attribute names

[bill]

Use "title" for Dialog, Titlepane, and children of PageContainer/TabContainer/AccordionContainer?, since title is part of the HTML DTD.

For Button, MenuItem?, etc., use "text" and "icon" to represent each of those things, rather than "label" (which has another meaning in HTML), or "caption", which just doesn't sound right.

[bill]

(In [8941]) Use "title" as attribute name for widgets that have a title and content. Also some other cleanup, including removing classNames as parameters of Accordion. Also changed parser to workaround problem with numeric value being undefined. Refs #3288

[bill]

(In [9343]) In markup, prefer innerHTML to attributes (for Button and Menu labels). Refs #3288

[bill]

(In [9346]) In markup, prefer innerHTML to attributes (for Button and Menu labels). Refs #3288

[bill]

(In [9347]) Standardize on "label" (not caption). Fixes #3288.

[bill]

(In [9447]) Support setDisabled() as a public method rather than separate enable()/disable() methods. Refs #3288.

[bill]

(In [9448]) Name callback onChange(), rather than onValueChanged(), since onChange() is an HTML standard. Refs #3288, and fixes #3462.

[bill]

(In [9480]) Remove cruft (onChange is defined in _FormWidget). Refs #3288.

[bill]

(In [9544]) Change "selectedColor" to "value" and onColorSelected() to onChange(). I think we still need to ColorPalette? to show a currently selected color in the same way that _Calendar shows the currently selected date. Refs #3288.

[bill]

(In [9721]) For toggle widgets (ToggleButton?, Checkbox, Radio), use "checked" rather than "selected", since "checked" is an HTML standard. and also to allow menu items (and tree nodes, maybe) to be checked and selected (ie, highlighted) independently.

Refs #3288 (and see also [9223])