Improve a11y

[tadatuta]

Improve accessibility:

• select select: improve JAWS readability #1517, select: проверить соответствие руководству по доступности #1465 PR - [WIP] select: improve JAWS readability #1594
• attach attach: improve JAWS readability #1491 PR - attach: improve JAWS readability #1575
• button button: improve JAWS readability #1479 PR - button: improve a11y #1553
• checkbox checkbox: improve JAWS readability #1492 PR - checkbox, checkbox-group: improve JAWS readability #1558
• checkbox-group checkbox-group: improve JAWS readability #1521 PR - checkbox, checkbox-group: improve JAWS readability #1558
• control-group control-group: improve JAWS readability #1522 PR control-group: add a11y attributes #1556
• control
• dropdown dropdown: improve JAWS readability #1501 PR - dropdown: improve JAWS readability #1636
• icon
• image image: improve JAWS readability #1488 PR - image: improve JAWS readability #1554
• input input: improve JAWS readability #1504
• link link: improve JAWS readability #1476 PR - link: improve JAWS readability #1555
• menu, menu-item menu, menu-item: improve JAWS readability #1508, menu: проверить соответствие руководству по доступности #1458 PR - menu, menu-item: improve JAWS readability #1578
• modal modal: improve JAWS readability #1509, modal: проверить соответствие руководству по доступности #1459 PR - modal: improve JAWS readability #1580
• popup popup: improve JAWS readability #1510, popup: проверить соответствие руководству по доступности #1460 PR - popup: improve JAWS readability #1579
• progressbar progressbar: improve JAWS readability #1511 PR - progressbar: improve JAWS readability #1572
• radio, radio-group radio, radio-group: improve JAWS readability #1512 PR - radio, radio-group: improve JAWS readability #1557
• spin spin: improve JAWS readability #1537
• textarea textarea: improve JAWS readability #1515
• z-index-group

All listed components (except crossed out items) must be accessible to assistive technologies (AT). We use JAWS for testing as the most popular AT.

Test scope: Firefox + JAWS (40-min trial)

Virtualization: VirtualBox + MS Windows (for Mac or Linux users)

WAI-ARIA specification

Old main PR #1380 (won't be merged, look for some solutions)

Notes:

• item checked mean that PR was sent
• crossed oud items - PR already merged

[aristov]

Summary from meeting with @ruslansagitov:

1. get rid of public API for a11y
2. get rid of duplicate attributes
3. make test form and look how it works
4. examine complex cases (such as radio_type_button, checkbox-group, menu etc.)

UPD: comment is outdated, look issue description for details.