1.0.0-beta.58

• Fixed source view supported syntaxes to list modes with no mime
• Fixed editor's hint popup positioning when widget is not fit into the page bounds
• Added options parameter for loadDataFromUrl() with following options:
  • fetch – is passing as is into fetch() as second argument
  • isResponseOk(response) – a function to check response is ok
  • getContentSize(url, response) - a function to determine a size of decoded content
  • validateData(data) - a function to check payload is valid response data, must throw an error if data is invalid
• Changed Widget#setContainer() to append only if container is an instance of Node