drawpile/Drawpile

AI Summary: Implement a language selection dropdown on the Drawpile web browser start page. The dropdown should allow users to choose a language before starting the application, defaulting to a URL parameter, browser language, or English. The implementation should use JavaScript and HTML and avoid flag icons, displaying language names in English and their native script.

AI Summary: Implement a simple HTML5 pressure test on the Drawpile browser start page using JavaScript to allow users to verify pen pressure functionality before launching the full application. This involves creating a pressure-sensitive box that displays a message confirming pressure detection based on varying pen event pressure levels. The implementation will be within the existing `init.js` file and will not require WebAssembly interaction.