Make pipeline widget padding consistent between MR and commit pages

app/assets/stylesheets/pages/merge_requests.scss

@@ -138,12 +138,6 @@
       line-height: 16px;
     }
 
-    @media (min-width: $screen-sm-min) {
-      .stage-cell {
-        padding: 0 4px;
-      }
-    }
-
     @media (max-width: $screen-xs-max) {
       order: 1;
       margin-top: $gl-padding-top;

app/assets/stylesheets/pages/pipelines.scss

@@ -257,7 +257,7 @@
 
 .stage-cell {
   font-size: 0;
-  padding: 10px 4px;
+  padding: 0 4px;
 
   > .stage-container > div > button > span > svg,
   > .stage-container > button > svg {