fix styling on media tag download button

www/common/cryptpad-common.js

@@ -1239,7 +1239,7 @@ define([
                 var sizeMb = Cryptpad.bytesToMegabytes(size);
 
                 var $btn = $(root).find('button');
-                $btn.addClass('btn btn-primary btn-success')
+                $btn.addClass('btn btn-success')
                     .attr('type', 'download')
                     .html(function (i, html) {
                         var text = Messages.download_mt_button + '<br>';

www/slide/inner.js

@@ -1,8 +1,10 @@
 define([
     'jquery',
+    'css!/bower_components/bootstrap/dist/css/bootstrap.min.css',
     'less!/customize/src/less/toolbar.less',
     'less!/customize/src/less/cryptpad.less',
     'less!/slide/slide.less',
+
     'css!cm/lib/codemirror.css',
     'css!cm/addon/dialog/dialog.css',
     'css!cm/addon/fold/foldgutter.css',