Fix Dashboard accessibility issues found in the 3.11 accessibility audit

Setup Log in as admin Go to your dashboard Make sure a 'Private files' block is available on the dashboard (add one if it's not) Click on the "Manage private files..." link in the 'private files' block In the file manager: Add 2 files Add 2 directories Add 2 files and 2 directories to each directory Save changes Test 1 Log in as admin and go to your dashboard View page source (usually Ctrl+u) Copy the source Visit  https://validator.w3.org/nu/ Set the check by field to 'text input' and replace the content of the text editor with what you copied on step 3 Press the 'check' button Press the 'message filtering' button Verify  that you don't see any errors Note: because of some recently integrated codes, you may see some irrelevant errors. Please check with me if you saw any errors before failing this issue. Test 2 Add the 'Navigation' and 'Administration' blocks to your dashboard Repeat the following steps for the 'private files', 'navigation' and 'administration' blocks Click on the title of the block Press Tab multiple times until an item in the content tree of the block is focused Verify that you can move up/down using the keyboard Verify that the current item in the tree is highlighted Test 3 Log in as admin Go to Site administration > Badges > Manage Badges Create 2 badges. Other than the mandatory fields, fill the 'Image caption' field with a random text for the first badge, and leave that field empty for the second badge Go to Site administration > Badges > Manage Badges For each badge you created: Click on the badge title Go to the Criteria tab Add 'Manual issue by role' criteria and select 'Manager' on the next screen and save changes Click on the 'Enable access' button and confirm the action on the next screen Go to the Recipients tab and award the badge to yourself (to admin) Go to your dashboard Add a 'Latest badges' block there if the block isn't there Press the WAVE extension's button Verify that no 'Missing alternative text' error is reported