Updated some comment elements and standardised more JS

- Updated comment routes to be simpler.
- Updated comments JS to align better with updated component system.
- Documented available global JS functions/services.
- Removed redundant controller method.
- Added window.$events helpers for validation messages and
success/error.
- Updated JS events system to not be class based for simplicity.
- Added window.trans_plural method to handle pluralisation/replacements
where you already have the translation string itself.

Fixes #1836

dev/docs/components.md

@@ -59,4 +59,41 @@ Will result with `this.$opts` being:
     "delay": "500",
     "show": ""  
 }
+```
+
+#### Global Helpers
+
+There are various global helper libraries which can be used in components:
+
+```js
+// HTTP service
+window.$http.get(url, params);
+window.$http.post(url, data);
+window.$http.put(url, data);
+window.$http.delete(url, data);
+window.$http.patch(url, data);
+
+// Global event system
+// Emit a global event
+window.$events.emit(eventName, eventData);
+// Listen to a global event
+window.$events.listen(eventName, callback);
+// Show a success message
+window.$events.success(message);
+// Show an error message
+window.$events.error(message);
+// Show validation errors, if existing, as an error notification
+window.$events.showValidationErrors(error);
+
+// Translator
+// Take the given plural text and count to decide on what plural option
+// to use, Similar to laravel's trans_choice function but instead
+// takes the direction directly instead of a translation key.
+window.trans_plural(translationString, count, replacements);
+
+// Component System
+// Parse and initialise any components from the given root el down.
+window.components.init(rootEl);
+// Get the first active component of the given name
+window.components.first(name);
 ```