KPropertiesDialog/General: Make accessible
This merge request makes the "General" tab in the file properties dialog pretty much fully accessible.
- Allow keyboard focus to go to the information text labels when pressing the Tab key.
- Set buddies for labels so the context of information is clear.
- Add accessible information whenever the context is still not clear.
- Change the Tab key focus order to go from top to bottom as expected.
Known issues: The KIO-external widgets KIconButton and KCapacityBar are not fully accessible, meaning the information they display does not seem to be announced by screen readers even if keyboard focus goes to them.
Acknowledgement
This work is part of my project funded through the NGI0 Commons Fund, a fund established by NLnet with financial support from the European Commission's Next Generation Internet programme.