(trafficshaper) make direction an advanced setting

src/opnsense/mvc/app/controllers/OPNsense/TrafficShaper/forms/dialogRule.xml

@@ -51,6 +51,8 @@
         <id>rule.direction</id>
         <label>direction</label>
         <type>dropdown</type>
+        <advanced>true</advanced>
+        <help>matches incomming or outgoing packets or both (default)</help>
     </field>
     <field>
         <id>rule.target</id>