Wysiwyg text 2.0 (#238)

* Fixed cleaning handlers after cleanup

* Double click to edit text

* Preserve text styles on change

src/element/index.ts

@@ -9,3 +9,4 @@ export { handlerRectangles } from "./handlerRectangles";
 export { hitTest } from "./collision";
 export { resizeTest } from "./resizeTest";
 export { isTextElement } from "./typeChecks";
+export { textWysiwyg } from "./textWysiwyg";