Add search to emoji picker (#1395)

app/assets/javascripts/components/features/compose/components/emoji_picker_dropdown.jsx

@@ -47,7 +47,7 @@ const EmojiPickerDropdown = React.createClass({
         </DropdownTrigger>
 
         <DropdownContent className='dropdown__left'>
-          <EmojiPicker emojione={settings} onChange={this.handleChange} />
+          <EmojiPicker emojione={settings} onChange={this.handleChange} search={true} />
         </DropdownContent>
       </Dropdown>
     );