MAGETWO-52993: [Github] Media Uploader Issues #2958

 - clear error message every time a new file is chosen for upload.

Author: Cari Spruiell

app/code/Magento/Cms/view/adminhtml/templates/browser/content/uploader.phtml

@@ -71,8 +71,8 @@ require([
             var progressSelector = '#' + data.fileId + ' .progressbar-container .progressbar';
             var tempErrorMessage = document.createElement("div");
             $(progressSelector).css('width', '100%');
+            $('[data-action="show-error"]').children(".message").remove();
             if (data.result && !data.result.hasOwnProperty('errorcode')) {
-                $('[data-action="show-error"]').children(".message").remove();
                 $(progressSelector).removeClass('upload-progress').addClass('upload-success');
             } else {
                 tempErrorMessage.className = "message message-warning warning";