Fix issue with same images uploaded twice in demo (https://github.com/draft-js-plugins/draft-js-plugins/pull/188), remove progress and src property after upload, optionally retain src if retainSrc is true at handleUpload
Fix issue with same images uploaded twice in demo (https://github.com/draft-js-plugins/draft-js-plugins/pull/188), remove progress and src property after upload, optionally retain src if retainSrc is true at handleUpload

nikgraf/draft-js-plugin-editor,dagopert/draft-js-plugins,nikgraf/draft-js-plugin-editor,koaninc/draft-js-plugins,draft-js-plugins/draft-js-plugins,dagopert/draft-js-plugins,nikgraf/draft-js-plugin-editor,koaninc/draft-js-plugins,draft-js-plugins/draft-js-plugins,dagopert/draft-js-plugins,draft-js-plugins/draft-js-plugins,draft-js-plugins/draft-js-plugins