NanoUI updates.

* Simplified the code used in ui_interact procs and updated all current uses.
* Removed ununused jsviews JavaScript code (replaced it with vanilla jsrender).
* Added a message to the UI which shows if JavaScript is disabled (people with JavaScript disabled previously got blank UIs).

code/modules/nano/nanomanager.dm

@@ -14,6 +14,29 @@
 /datum/nanomanager/New()
 	return
 
+ /**
+  * Get an open /nanoui ui for the current user, src_object and ui_key and try to update it with data
+  *
+  * @param user /mob The mob who opened/owns the ui
+  * @param src_object /obj|/mob The obj or mob which the ui belongs to
+  * @param ui_key string A string key used for the ui
+  * @param ui /datum/nanoui An existing instance of the ui (can be null)
+  * @param data list The data to be passed to the ui, if it exists
+  *
+  * @return /nanoui Returns the found ui, for null if none exists
+  */
+/datum/nanomanager/proc/try_update_ui(var/mob/user, src_object, ui_key, var/datum/nanoui/ui, data)
+	if (!ui) // no ui has been passed, so we'll search for one
+	{
+		ui = get_open_ui(user, src, ui_key)
+	}
+	if (ui)		
+		// The UI is already open so push the data to it
+		ui.push_data(data)
+		return ui
+		
+	return null
+
  /**
   * Get an open /nanoui ui for the current user, src_object and ui_key
   *
@@ -21,7 +44,7 @@
   * @param src_object /obj|/mob The obj or mob which the ui belongs to
   * @param ui_key string A string key used for the ui
   *
-  * @return /nanoui Returns the found ui, for null if none exists
+  * @return /nanoui Returns the found ui, or null if none exists
   */
 /datum/nanomanager/proc/get_open_ui(var/mob/user, src_object, ui_key)
 	var/src_object_key = "\ref[src_object]"

code/modules/nano/nanoui.dm

@@ -308,6 +308,7 @@ nanoui is used to open and update nano browser uis
 		<div id='uiWrapper'>
 			[title ? "<div id='uiTitleWrapper'><div id='uiStatusIcon' class='icon24 uiStatusGood'></div><div id='uiTitle'>[title]</div><div id='uiTitleFluff'></div></div>" : ""]
 			<div id='uiContent'>
+				<noscript><div id='uiNoJavaScript'>Your browser does not have JavaScript enabled. Please enable JavaScript restart SS13.</div></noscript>
 	"}
 
  /**