feat: add maxfile less than one

templates/datasets/create.tmpl

@@ -29,7 +29,7 @@
 					<div class="field required dataset-files">
 						<label>{{.i18n.Tr "dataset.file"}}</label>
 						<div class="files"></div>
-						<div class="ui dropzone" id="dropzone" data-upload-url="{{AppSubUrl}}/attachments" data-accepts="{{.AttachmentAllowedTypes}}" data-max-file="{{.AttachmentMaxFiles}}" data-max-size="{{.AttachmentMaxSize}}" data-default-message="{{.i18n.Tr "dropzone.default_message"}}" data-invalid-input-type="{{.i18n.Tr "dropzone.invalid_input_type"}}" data-file-too-big="{{.i18n.Tr "dropzone.file_too_big"}}" data-remove-file="{{.i18n.Tr "dropzone.remove_file"}}"></div>
+						<div class="ui dropzone" id="dropzone" data-upload-url="{{AppSubUrl}}/attachments" data-accepts="{{.AttachmentAllowedTypes}}" data-max-file="1" data-max-size="{{.AttachmentMaxSize}}" data-default-message="{{.i18n.Tr "dropzone.default_message"}}" data-invalid-input-type="{{.i18n.Tr "dropzone.invalid_input_type"}}" data-file-too-big="{{.i18n.Tr "dropzone.file_too_big"}}" data-remove-file="{{.i18n.Tr "dropzone.remove_file"}}"></div>
 					</div>
 					<br/>
 					<div class="inline field">

web_src/less/_form.less

@@ -30,7 +30,7 @@
         }
 
         @media only screen and (min-width: 768px) {
-            width: 800px !important;
+            // width: 800px !important;
 
             .header {
                 padding-left: @create-page-form-input-padding+30px;