Adjust the URL in the documentation to the released version

sixtyfps-viewer: re-enable the x11 feature by default

Some change in the feature handling caused it not to enable x11 nor wayland

Add missing colon for simple input dialog eaxmple

Fix publishing

the testing backend is not on crates.io, so the dev-dependency must not
have a version field

Change the version number in docs-preview.html

Update some more version number

Meaning that following the docs or tutorial won't work until the release is complete

Add sixtyfps-lsp in the publish script

Fix horizontal scrollbar in ugly style

the new rendering backend behavior is different if the border radius is bigger
than the small border

More fixes to disabled widgets

Fix the extension of the npm package