[DO NOT MERGE] a11y fixes

[pascalwengerter]

DO NOT MERGE - WIP PR

Description

Implementing feedback from the a11y audit

Related Issue

• Fixes [a11y] 9.1.1.1a - Alternative texts for control elements #5375
• Fixes [a11y] 9.1.3.1b - HTML-Structure elements for lists #5378
• Fixes [a11y] 9.1.3.1d - Structured content #5379
• Fixes [a11y] 9.1.3.1g - No structure markup for layout tables #5381
• Fixes [a11y] 9.1.3.2 - Logical order #5383
• Partly fixes [a11y] 9.4.1.2 - Name, role, value available #5397 (page title for location picker)
• Fixes [a11y] 9.3.3.1 - Error detection #5396
• Fixes [a11y] 9.3.2.4 - Consistent labelling #5395

Also, owncloud/ocis#2309 fixes two more issues (#5376 and #5377)

Open tasks:

• Should fix some more issues between # 5375 and # 5398

[update-docs]

Thanks for opening this pull request! The maintainers of this repository would appreciate it if you would create a changelog item based on your changes.

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
3 out of 4 committers have signed the CLA.

✅ lookacat
✅ pascalwengerter
✅ kulmann
❌ Pascal Wengerter

---

Pascal Wengerter seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[JammingBen]

A lot of merge conflicts as the code base changed heavily over the last few months. @pascalwengerter what do you think, does it make sense to keep this open?

[pascalwengerter]

I'll close here since the codebase has moved on (as in "improved") a lot in the last 2,5 years, and a11y has gotten its way into many new or refactored components. While the project most likely would need another audit before picking up certification, this PR can still be found if need arises, but isn't actionable enough for now.