Fixes/tweaks for NanoUI. These were made by TG coders, so I'm just adding them here.

* Transfer open ui instances when transferring a user to another mob
* Runtime fixes in the NanoUI Topic and nanoclose client verb
* Return focus to the map when a NanoUI is opened

code/modules/nano/nanoexternal.dm

@@ -13,7 +13,7 @@
 
 	var/datum/nanoui/ui = locate(uiref)
 
-	if (ui)
+	if (istype(ui))
 		ui.close()
 		
 		if(ui.ref)

code/modules/nano/nanomanager.dm

@@ -112,5 +112,27 @@
 	for (var/datum/nanoui/ui in user.open_uis)
 		ui.close();
 
+ /**
+  * This is called when a player transfers from one mob to another
+  * Transfers all open UIs to the new mob
+  *
+  * @param oldMob /mob The user's old mob
+  * @param newMob /mob The user's new mob
+  *
+  * @return nothing
+  */
+/datum/nanomanager/proc/user_transferred(var/mob/oldMob, var/mob/newMob)
+	if (isnull(oldMob.open_uis) || !istype(oldMob.open_uis, /list) || open_uis.len == 0)
+		return 0 // has no open uis
 
+	if (isnull(newMob.open_uis) || !istype(newMob.open_uis, /list))
+		newMob.open_uis = list()
+
+	for (var/datum/nanoui/ui in oldMob.open_uis)
+		ui.user = newMob
+		newMob.open_uis.Add(ui)
+
+	oldMob.open_uis.Cut()
+	
+	return 1 // success
 

code/modules/nano/nanoui.dm

@@ -135,7 +135,6 @@ nanoui is used to open and update nano browser uis
 		if (dist > 4)
 			close()
 			return
-
 		
 		if ((allowed_user_stat > -1) && (user.stat > allowed_user_stat))
 			set_status(STATUS_DISABLED, push_update) // no updates, completely disabled (red visibility)
@@ -352,6 +351,7 @@ nanoui is used to open and update nano browser uis
 		window_size = "size=[width]x[height];"
 	update_status(0)
 	user << browse(get_html(), "window=[window_id];[window_size][window_options]")
+	winset(user, "mapwindow.map", "focus=true") // return keyboard focus to map
 	on_close_winset()
 	//onclose(user, window_id)
 	nanomanager.ui_opened(src)
@@ -405,7 +405,7 @@ nanoui is used to open and update nano browser uis
 	if (status != STATUS_INTERACTIVE || user != usr) // If UI is not interactive or usr calling Topic is not the UI user
 		return
 
-	if (src_object.Topic(href, href_list))
+	if (src_object && src_object.Topic(href, href_list))
 		nanomanager.update_uis(src_object) // update all UIs attached to src_object
 
  /**