Keep original text alignment; use a min-width.

services/web/public/stylesheets/app/editor.less

@@ -32,6 +32,8 @@
 
 	.alert {
 		display: inline-block;
+		text-align: left;
+		min-width: 400px;
 		padding: (@line-height-computed / 4);
 		font-size: 14px;
 		margin-bottom: (@line-height-computed / 4);