Minor style fixes for the user management screen

References https://github.com/TryGhost/Ghost/pull/3189 and #21

core/client/assets/sass/layouts/settings.scss

@@ -328,7 +328,7 @@
                 padding: 9px 8px 0 0;
                 left: 9px;
                 bottom: 0;
-                width: 20px;
+                width: 26px;
                 border-right: darken($green, 8%) 1px solid;
             };
         }

core/client/assets/sass/modules/objectlist.scss

@@ -37,7 +37,7 @@
     &:hover {
         background: lighten($lightbrown, 5%);
     }
-    &:last-child:hover {
+    &:last-of-type:hover {
         box-shadow: inset 0px -1px 0px $lightbrown;
     }
 
@@ -99,6 +99,10 @@
     .object-list-action + .object-list-action {
         margin-left: 20px;
     }
+    .role-label {
+        float: left;
+        margin-top: -1px;
+    }
     .role-label + .role-label {
         margin-left: 5px;
     }