Very slightly adjusting the padding in the tabs.

@caged didn't bother with a pull request. It was bothering me that the
x was closer to the edge of the tab, than the filename. So I made it
equal. I also added some right padding to the name so it doesn't get too
close to the x icon.

static/tabs.css

@@ -28,7 +28,7 @@
   overflow: hidden;
   white-space: nowrap;
   text-overflow: ellipsis;
-  padding: 3px 5px;
+  padding: 3px 10px 3px 0;
 }
 
 .tab .close-icon {
@@ -39,7 +39,7 @@
   cursor: pointer;
   position: absolute;
   color: rgba(255, 255, 255, 0.5);
-  right: 5px;
+  right: 8px;
   top: 4px;
   -webkit-font-smoothing: antialiased;
 }
@@ -56,7 +56,7 @@
   top: 10px;
   width: 5px;
   height: 5px;
-  right: 6px;
+  right: 9px;
   border: 2px solid #66a6ff;
   border-radius: 12px;
 }
@@ -69,7 +69,7 @@
   border: none;
   width: 12px;
   height: 12px;
-  right: 5px;
+  right: 8px;
   top: 4px;
 }