* Set `accessible-action-default` on `ListView` items
* Set `accessible-role` on `ListItem` for Qt style
* Set `accessible-label` on `ListItem` for Qt style
- Rename `accessible-selectable` and `accessible-selected` to `accessible-item-{selectable,selected}`.
Because the property is for items in list rather than eg Text
- Rename `accessible-position-in-set` to `accessible-item-index`.
- Rename `accessible-size-of-set` to `accessible-item-count` and move
the property to the container element rather than the item itself
Updated the version from 1.1 to 1.2
Renamed the header to "Slint Royalty-free Desktop, Mobile, and Web Applications License"
Added definition of "Mobile Application" and grant of right
Moved "Limitations" to 3rd section and "License Conditions - Attributions" to 2nd section
Added flexibility to choose between showing "MadeWithSlint" as a dialog/splash screen or on a public webpage
Moved the para on copyright notices to section under "Limitations"