Ability to add files from the drive toolbar

Fix CSS issues with the different toolbars
Translate the backup URL button alert

www/poll/index.html

@@ -22,6 +22,9 @@
             color: #000;
             line-height: auto;
         }
+        .cryptpad-toolbar {
+            display: inline-block;
+        }
         .realtime {
             display: block;
             overflow: auto;