Additional aesthetic clean-up

IPython/html/static/notebook/less/savewidget.less

@@ -5,6 +5,7 @@ span.save_widget {
         height: 1em;
         line-height: 1em;
         padding: 3px;
+        margin-left: @padding-large-horizontal;
         border: none;
         font-size: 146.5%;
         &:hover{

IPython/html/static/terminal/less/terminal.less

@@ -3,8 +3,6 @@
   font-family: monospace;
   color: white;
   background: black;
-  border-radius: @border-radius-base;
-  .box-shadow(@global-shadow-dark);
   padding: @code_padding;
 
   &, dummy-screen {
@@ -19,5 +17,8 @@
 }
 
 #terminado-container {
-  padding-top: @page-header-padding;
+  margin-top: @page-header-padding;
+  background: black;
+  border-radius: @border-radius-base;
+  .box-shadow(@global-shadow-dark);
 }