Added tsx files to grunt watch.

Fixed minor bug in conversation view.

Gruntfile.js

@@ -176,7 +176,7 @@ module.exports = grunt => {
         tasks: ['sass'],
       },
       transpile: {
-        files: ['./ts/**/*.ts'],
+        files: ['./ts/**/*.ts','./ts/**/*.tsx'],
         tasks: ['exec:transpile'],
       },
     },

js/views/conversation_view.js

@@ -1520,7 +1520,7 @@
       const colons = `:${emojiData[e.index].short_name}:`;
 
       const textarea = this.$messageField[0];
-      if (textarea.selectionStart || textarea.selectionStart === '0') {
+      if (textarea.selectionStart || textarea.selectionStart === 0) {
         const startPos = textarea.selectionStart;
         const endPos = textarea.selectionEnd;