Emoji picker: Handle Manu's comments.

Riot/Modules/Room/EmojiPicker/Data/Store/EmojiItem.swift

@@ -17,21 +17,37 @@
 import Foundation
 
 struct EmojiItem {
-    let identifier: String
+    
+    // MARK: - Properties
+    
+    /// The commonly-agreed short name for the emoji, as supported in GitHub and others via the :short_name: syntax (e.g. "grinning" for 😀).
+    let shortName: String
+    
+    /// The emoji string (e.g. 😀)
     let value: String
+    
+    /// The offical Unicode name (e.g. "Grinning Face" for 😀)
     let name: String
+    
+    /// An array of all the other known short names (e.g. ["running"] for 🏃‍♂️).
     let shortNames: [String]
-    let keywords: [String]    
+    
+    /// Associated emoji keywords (e.g. ["face","smile","happy"] for 😀).
+    let keywords: [String]
+    
+    /// For emoji with multiple skin tone variations, a list of alternative emoji items.
     let variations: [EmojiItem]
     
-    init(identifier: String,
+    // MARK: - Setup
+    
+    init(shortName: String,
          value: String,
          name: String,
          shortNames: [String] = [],
          keywords: [String] = [],
          variations: [EmojiItem] = []) {
         
-        self.identifier = identifier
+        self.shortName = shortName
         self.value = value
         self.name = name
         self.shortNames = shortNames