Enable MergeableSelector in scss-lint (for !14567)

app/assets/stylesheets/pages/pipelines.scss

@@ -475,7 +475,7 @@
       top: 5px;
 
       // Action Icons in big pipeline-graph nodes
-      .ci-action-icon-wrapper {
+      &.ci-action-icon-wrapper {
         height: 30px;
         width: 30px;
         background: $white-light;
@@ -500,6 +500,14 @@
           width: 18px;
           height: 18px;
         }
+
+        &.play {
+          svg {
+            width: #{$ci-action-icon-size - 8};
+            height: #{$ci-action-icon-size - 8};
+            left: 8px;
+          }
+        }
       }
     }
 
@@ -746,43 +754,44 @@ button.mini-pipeline-graph-dropdown-toggle {
         left: -3px;
         position: relative;
         top: -2px;
-      }
-
-      &:hover svg,
-      &:focus svg {
-        fill: $gl-text-color;
-      }
 
-      &.icon-action-retry,
-      &.icon-action-play {
-        svg {
-          width: #{$ci-action-icon-size - 6};
-          height: #{$ci-action-icon-size - 6};
-          left: 8px;
-        }
-      }
-
-      svg.icon-action-stop,
-      svg.icon-action-cancel {
+        &.icon-action-stop,
+        &.icon-action-cancel {
           width: 12px;
           height: 12px;
           top: 1px;
           left: -1px;
         }
 
-      svg.icon-action-play {
+        &.icon-action-play {
           width: 11px;
           height: 11px;
           top: 1px;
           left: 1px;
         }
 
-      svg.icon-action-retry {
+        &.icon-action-retry {
           width: 16px;
           height: 16px;
           top: 0;
           left: -3px;
         }
+      }
+
+      &:hover svg,
+      &:focus svg {
+        fill: $gl-text-color;
+      }
+
+      &.icon-action-retry,
+      &.icon-action-play {
+        svg {
+          width: #{$ci-action-icon-size - 6};
+          height: #{$ci-action-icon-size - 6};
+          left: 8px;
+        }
+      }
+
 
     }
 
@@ -852,12 +861,6 @@ button.mini-pipeline-graph-dropdown-toggle {
   top: -10px;
   box-shadow: 0 1px 5px $black-transparent;
 
-  .mini-pipeline-graph-dropdown-item {
-    .ci-status-icon {
-      top: -1px;
-    }
-  }
-
   /**
    * Top arrow in the dropdown in the big pipeline graph
    */