Minor code style fixes

app/styles/components/kanban-task.scss

@@ -38,14 +38,13 @@
         }
         .assigned-to {
             color: darken($postit-hover, 15%);
-            display: block;
+            display: none;
             overflow: hidden;
             position: relative;
             text-overflow: ellipsis;
             top: -6px;
             white-space: nowrap;
             width: 50px;
-            display: none;
         }
     }
     .task-assigned {

app/styles/modules/kanban/kanban-table.scss

@@ -63,16 +63,11 @@ $column-margin: 0 10px 0 0;
             margin-right: 0;
         }
         .kanban-wip-limit {
-            @extend %xsmall;
-            @include table-flex();
             background: $red;
             border-radius: 2px;
-            bottom: 8px;
             height: 4px;
-            margin: 0;
+            margin: .5rem 0;
             padding: 0;
-            position: relative;
-            width: 100%;
         }
     }
     .kanban-uses-box {