Hiding slash button when text is entered

Closes  #1373

app/partials/desktop/im.html

@@ -230,7 +230,7 @@
                       <div class="composer_progress_icon_wrap">
                         <div class="composer_progress_icon" my-arc-progress width="22" stroke="2.5"></div>
                       </div>
-                      <a class="composer_command_btn" ng-show="!historyState.replyKeyboard && commands.list.length > 0 && (!draftMessage.text.length || draftMessage.text[0] == '/')" ng-mousedown="toggleSlash($event)" ng-class="draftMessage.text[0] == '/' ? 'active' : ''"><i class="icon icon-slash"></i></a>
+                      <a class="composer_command_btn" ng-show="!historyState.replyKeyboard && commands.list.length > 0 && (!draftMessage.text.length || draftMessage.text == '/')" ng-mousedown="toggleSlash($event)" ng-class="draftMessage.text[0] == '/' ? 'active' : ''"><i class="icon icon-slash"></i></a>
                       <a class="composer_keyboard_btn" ng-show="historyState.replyKeyboard._ == 'replyKeyboardMarkup'" ng-mousedown="replyKeyboardToggle($event)" ng-class="!historyState.replyKeyboard.pFlags.hidden ? 'active' : ''"><i class="icon icon-keyboard"></i></a>
 
                       <div class="im_send_dropbox_wrap" my-i18n="im_photos_drop_text"></div>