AVT: JAWS not reading disabled buttons as unavailable

[Satya Minnekanti]

To reproduce the defect:

1. Open AJAX Sample and click on Create Editor button.

2. Press Alt + F10 to navigate to toolbar.

3. Navigate to Undo or Redo button.

Expected Result: JAWS should read Undo or Redo button unavailable

Actual Result: JAWS reads Undo or Redo button but it did not read unavailable. This is because aria-disabled=true missing on all the disabled buttons

This issue is only happening from 4.3

This is a failure of Accessibility checkpoint 1.3a & 4.1b

[Teresa Monahan]

Replying to fredck:

Hi Fred, Can this be targeted for 4.3.1? This is an accessibility failure and the 4.3.2 release will be too late for some of our products.

[Frederico Caldeira Knabben]

Replying to tmonahan:

I'll check this, but we already froze the code and it's on testing phase for release on Tuesday. I'm afraid it may be already too late for it.

[Frederico Caldeira Knabben]

Introduced with ​git:a195b2a.

Basically, we're not any move initializing disabled buttons, so the aria-disabled attribute is not set on startup.

[Frederico Caldeira Knabben]

Pushed t/11260@cksource.

[Piotrek Koszuliński]

I pushed additional commit which fixes a bug in a button template.

[Piotrek Koszuliński]

Fixed on master with ​git:93a07a4.

[Teresa Monahan]

Thanks to you all for the speedy turn around on this! We really appreciate it!!

[Marek Lewandowski]

issue summary typo fixed