Replace 'react-native' imports with direct imports to the relevant
module within 'react-native-web'. Follow up task is to also rewrite
'react-native-web' imports from the entry file to become direct imports
(reduces bundle size).
Close#608
Problem:
The content of style sheets was being set as a child of 'style', which
causes React to escape the content. This meant that the pointer-events
selectors were broken (">" became ">") and pointer-events were
disabled for the entire server-rendered document.
Solution:
Use 'dangerouslySetInnerHTML' to avoid the CSS text being escaped.
Fix#546
This changes the return value of 'getApplication' so that the
application element and stylesheets are all available as React elements.
Also changes StyleSheet's 'renderToString' to 'getStyleSheets'.
Fix#504
