Fixes runJs, deduplicates template and adds <noscript> to index.html template

[soywiz]

No description provided.

[soywiz]

ES2015 uses .mjs files, where require() function is not available. Thus we cannot use ES2015 yet unless we update korlibs to not use dynamic require in nodeJS. Maybe we can use import(), and we can check which function (require or import) is available.

[soywiz]

ES2015 output reduces :korge-sandbox:runJs from 2.5MB to 1.9MB in release mode (esbuild minification without using google closure compiler)