Fixed encodeEntities

Also fixed nested emojis in links
Closes #702

app/js/lib/ng_utils.js

@@ -1425,6 +1425,7 @@ angular.module('izhukov.utils', [])
     if (nested === undefined) {
       return encodeEntities(text);
     }
+    options.hasNested = true;
 
     return wrapRichText(text, {entities: nested, nested: true});
   }
@@ -1642,7 +1643,7 @@ angular.module('izhukov.utils', [])
 
     text = $sanitize(html.join(''));
 
-    if (emojiFound && !options.nested) {
+    if (!options.nested && (emojiFound || options.hasNested)) {
       text = text.replace(/\ufe0f|️|�|‍/g, '', text);
       text = text.replace(/<span class="emoji emoji-(\d)-(\d+)-(\d+)"(.+?)<\/span>/g,
                           '<span class="emoji emoji-spritesheet-$1" style="background-position: -$2px -$3px;" $4</span>');

app/js/lib/utils.js

@@ -361,6 +361,11 @@ function templateUrl (tplName) {
 function encodeEntities(value) {
   return value.
     replace(/&/g, '&').
+    replace(/[\uD800-\uDBFF][\uDC00-\uDFFF]/g, function (value) {
+      var hi = value.charCodeAt(0);
+      var low = value.charCodeAt(1);
+      return '&#' + (((hi - 0xD800) * 0x400) + (low - 0xDC00) + 0x10000) + ';';
+    }).
     replace(/([^\#-~| |!])/g, function (value) { // non-alphanumeric
       return '&#' + value.charCodeAt(0) + ';';
     }).