Ensure that all models compile in headless mode

Author: ERSUCC

HubNet Activities/Gridlock HubNet.nlogox

@@ -1483,5 +1483,5 @@ This activity and associated models and materials were created as part of the pr
     <note x="12" y="10" backgroundDark="0" fontSize="11" width="142" markdown="false" height="165" textColorDark="-1" textColorLight="-16777216" backgroundLight="0">Affect the state of your light by pressing the Change Light button, or changing the value of the Phase slider. The Phase slider controls the point in the cycle at which your light with change, and represents a percentage of the total cycle time.</note>
     <monitor x="173" precision="3" y="10" height="49" fontSize="11" width="113" display="Located At:"></monitor>
   </hubNetClient>
-  <previewCommands>need-to-manually-make-preview-for-this-model</previewCommands>
+  <previewCommands>startup</previewCommands>
 </model>

HubNet Activities/Memory HubNet.nlogox

@@ -85,7 +85,7 @@ end
 
 to go
   if not any? cards [
-    __hubnet-broadcast-user-message winner-message
+    hubnet-broadcast-message winner-message
     user-message winner-message
     stop
   ]

HubNet Activities/Unverified/Public Good HubNet.nlogox

@@ -1057,5 +1057,15 @@ This activity and associated models and materials were created as part of the pr
     <monitor x="85" precision="3" y="188" height="49" fontSize="11" width="92" display="Money Put In"></monitor>
     <button x="17" y="246" height="33" disableUntilTicks="false" forever="false" kind="Observer" width="238" display="pay-1-dollar-to-punish-the-rich"></button>
   </hubNetClient>
-  <previewCommands>need-to-manually-make-preview-for-this-model</previewCommands>
+  <previewCommands>startup
+repeat 4 [ __hubnet-create-client ]
+while [ not hubnet-message-waiting? ] [
+  wait 0.1
+]
+listen-clients
+ask student 0 [ set user-id "Matthew" ]
+ask student 1 [ set user-id "Seth" ]
+ask student 2 [ set user-id "Craig" ]
+ask student 3 [ set user-id "Josh" ]
+go</previewCommands>
 </model>

HubNet Activities/Unverified/Public Good HubNet.png

@@ -1081,5 +1081,5 @@ end]]></code>
       </indicator>
     </shape>
   </linkShapes>
-  <previewCommands>setup repeat 75 [ go ]</previewCommands>
+  <previewCommands>setup-testing repeat 75 [ ask first layers [ set-activation one-of [0 1] ] propogate ]</previewCommands>
 </model>