Обсуждение: [pgAdmin][RM4763][RM4762] Allow screen readers to identify errors andread description of non-textable elements.

Hi Hackers,

Attached patch fixes 

RM4763

• Added role alertdialog for confirm and alert dialog.
• Added role status for all status bars/banners.
• Added role alert for error bars.

RM4762

• Added aria-labelledby for charts on each dashboard, note that I have also added tabindex for each chart so that it is navigable using tab key.

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Thanks,

Nagesh