Updated the documentation for the ui_interact proc.

Moved the client nanoclose verb into nanoexternal.dm.

Removed debug comments.

code/modules/nano/nanoexternal.dm

@@ -1,4 +1,40 @@
-// All movable things can have a Nano UI, always use ui_interact to open/interact with a Nano UI
+ // This file contains all Nano procs/definitions for external classes/objects 
+ 
+ /**
+  * Called when a Nano UI window is closed
+  * This is how Nano handles closed windows
+  * It must be a verb so that it can be called using winset
+  *
+  * @return nothing
+  */
+/client/verb/nanoclose(var/uiref as text)
+	set hidden = 1	// hide this verb from the user's panel
+	set name = "nanoclose"
+
+	var/datum/nanoui/ui = locate(uiref)
+
+	if (ui)
+		ui.close()
+		
+		if(ui.ref)
+			var/href = "close=1"
+			src.Topic(href, params2list(href), ui.ref)	// this will direct to the atom's Topic() proc via client.Topic()
+		else if (ui.on_close_logic)
+			// no atomref specified (or not found)
+			// so just reset the user mob's machine var
+			if(src && src.mob)
+				src.mob.unset_machine()
+
+ /**
+  * The ui_interact proc is used to open and update Nano UIs
+  * If ui_interact is not used then the UI will not update correctly
+  * ui_interact is currently defined for /atom/movable
+  *
+  * @param user /mob The mob who is interacting with this ui
+  * @param ui_key string A string key to use for this ui. Allows for multiple unique uis on one obj/mob (defaut value "main")
+  *
+  * @return nothing
+  */
 /atom/movable/proc/ui_interact(mob/user, ui_key = "main")
 	return