fixed RichTextEditor, FixedInputTags, FreeInputTags enabled property, ad...

enabled functionality to these elements:

Button
Checkbox
Datepicker
FixedInputTags
FreeInputTags
InputNumber
InplaceText
InputText
InputTime
RichTextEditor
Select
Textarea
Typeahead
TypeaheadRemote
@mterjeki is there no css way to do these style changes?
1) We just add a special styleclass here to widget.next(), and the rest is done in dsweb.css
2) We can also use the "+" css selector in something like ```.typeahead + *[disabled]```