* fix: for safety measure check that a file is truthy before trying to upload it
* fix: push an error when file.$error is encountered to make sure it does not get uploaded
* fix: mark file as done if it errors
* format error messages
* fix: check for maxFileSize before uploading pasted images in tinymce
* remove the image from the DOM if any error is encountered
* feat: add property to fileManager to get and format the maxFileSize
* fix: make tinymce use fileManager to get maxFileSize
* fix(image cropper): check for maxFileSize before setting file to upload
* multiply by 1000 to get bytes