Ability to add files from the drive toolbar

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

customize.dist/toolbar.css

@@ -31,7 +31,6 @@
   user-select: none;
   font: normal normal normal 12px Arial, Helvetica, Tahoma, Verdana, Sans-Serif;
   color: #000;
-  display: inline-block;
   width: 100%;
   z-index: 9001;
 }
@@ -40,11 +39,9 @@
 }
 .cryptpad-toolbar .cryptpad-lag {
   box-sizing: content-box;
-  vertical-align: top;
   height: 16px;
   width: 16px;
   display: inline-block;
-  margin: 2px 0px;
   padding: 5px;
 }
 .cryptpad-toolbar .cryptpad-lag div {
@@ -65,7 +62,7 @@
   height: 26px;
   padding-right: 5px;
   padding-left: 5px;
-  margin: 2px;
+  margin: 3px 2px;
 }
 .cryptpad-toolbar button {
   background-color: inherit;