Fix typo on .alignright class so it actually works. :P

affinity/editor-blocks.css

@@ -37,7 +37,7 @@
 }
 
 .alignright {
-	margin-left: .8em 0 .8em 1.6em;
+	margin: .8em 0 .8em 1.6em;
 }
 
 /* Title */