TextArea: does not display disabled state

[dante]

http://archive.dojotoolkit.org/nightly/dojotoolkit/dijit/tests/form/test_Textarea.html

In the test page, if you disable the Textarea via the button, the input stops, though the Textarea doesn't look disabled at all.

Probably affects tundra, soria and nihilo.

[bill]

(In [13362]) CSS fixes for TextArea? and TextBox? disabled and focused modes:

• make disabled TextBox? based widgets (like ComboBox?) have gray text, to disambiguate them from enabled states (fixes #6574).

• same for TextArea? and SimpleTextArea?. Exception is TextArea? on FF2, which is difficult because of the iframe (fixes #6087).

• make TextArea/SimpleTextArea? indicate focus with darker border, just like TextBox? based widgets (fixes #6470). Note that for TextArea? widget, _focused and _blurred where bad names for private methods, since they conflict w/the state variables used by FormWidget:setStateClass().

!strict

[bill]

(In [13447]) Make themeTester.html have enabled and disabled versions of all the form widgets. Refs #6152, #6574, #6087

Also removed class="medium" affecting sizes on themeTester. Refs #6326.

And did some general cleanup/refactoring of tabs.

[alex]

(In [13745]) fixing unclosed tag introduced in [13447]. Refs #6152, #6574, #6087