Revert "Nanoui now supports use of multiple templates (#5105)"

This reverts commit a2841ce9d6.
It turns out nanoui already supports multiple templates.

code/modules/nano/nanoui.dm

@@ -519,8 +519,3 @@ nanoui is used to open and update nano browser uis
   */
 /datum/nanoui/proc/update(var/force_open = 0)
 	src_object.ui_interact(user, ui_key, src, force_open, master_ui, state)
-
-/datum/nanoui/proc/append_template(var/key, var/filename)
-	add_template(key, filename)
-	open()
-	update(1)

nano/js/nano_state.js

@@ -8,6 +8,7 @@ function NanoStateClass() {
 	}
 	
     this.key = this.key.toLowerCase();
+	
 	NanoStateManager.addState(this);*/
 }
 
@@ -22,24 +23,29 @@ NanoStateClass.prototype.isCurrent = function () {
 
 NanoStateClass.prototype.onAdd = function (previousState) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     NanoBaseCallbacks.addCallbacks();
     NanoBaseHelpers.addHelpers();
 };
 
 NanoStateClass.prototype.onRemove = function (nextState) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     NanoBaseCallbacks.removeCallbacks();
     NanoBaseHelpers.removeHelpers();
 };
 
 NanoStateClass.prototype.onBeforeUpdate = function (data) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     data = NanoStateManager.executeBeforeUpdateCallbacks(data);
+
     return data; // Return data to continue, return false to prevent onUpdate and onAfterUpdate
 };
 
 NanoStateClass.prototype.onUpdate = function (data) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     try
     {
         if (!this.layoutRendered || (data['config'].hasOwnProperty('autoUpdateLayout') && data['config']['autoUpdateLayout']))
@@ -49,13 +55,7 @@ NanoStateClass.prototype.onUpdate = function (data) {
         }
         if (!this.contentRendered || (data['config'].hasOwnProperty('autoUpdateContent') && data['config']['autoUpdateContent']))
         {
-			var content = "";
+            $("#uiContent").html(NanoTemplate.parse('main', data)); // render the 'mail' template to the #mainTemplate div
-			var keys = NanoTemplate.getKeys();
-			for (i = 0; i < keys.length; i++) {
-				if(keys[i] == "layout"){ continue; }
-				content += NanoTemplate.parse(keys[i], data);
-			}
-			$("#uiContent").html(content); // render the 'mail' template to the #mainTemplate div
             this.contentRendered = true;
         }
         if (NanoTemplate.templateExists('mapContent'))
@@ -64,12 +64,14 @@ NanoStateClass.prototype.onUpdate = function (data) {
             {
                 // Add drag functionality to the map ui
                 $('#uiMap').draggable();
+
                 $('#uiMapTooltip')
                     .off('click')
                     .on('click', function (event) {
                         event.preventDefault();
                         $(this).fadeOut(400);
                     });
+
                 this.mapInitialised = true;
             }
 
@@ -104,11 +106,13 @@ NanoStateClass.prototype.onUpdate = function (data) {
 
 NanoStateClass.prototype.onAfterUpdate = function (data) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     NanoStateManager.executeAfterUpdateCallbacks(data);
 };
 
 NanoStateClass.prototype.alertText = function (text) {
     // Do not add code here, add it to the 'default' state (nano_state_defaut.js) or create a new state and override this function
+
     alert(text);
 };
 

nano/js/nano_template.js

@@ -91,13 +91,6 @@ var NanoTemplate = function () {
         templateExists: function (key) {
             return _templates.hasOwnProperty(key);
         },
-		getKeys: function () {
-			var _keys = [];
-			for(var key in _templates) {
-				_keys.push(key);
-			}
-			return _keys;
-		},
         parse: function (templateKey, data) {
             if (!_compiledTemplates.hasOwnProperty(templateKey) || !_compiledTemplates[templateKey]) {
                 if (!_templates.hasOwnProperty(templateKey)) {