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"
Since we materialize only one point property, we don't need to cache the
parent position in a separate property, but we can just store that in
the binding.
The type of thep property is `Point`, which existed before. It was
mapped to `slint::private_unstable_api::re_exports::Point` (euclid) and
is now mapped to slint::LogicalPosition (also in C++).
