Fix btn group not having round corners when there's only some buttons present

app/assets/javascripts/vue_pipelines_index/pipeline_actions.js.es6

@@ -21,17 +21,14 @@
       <td class="pipeline-actions hidden-xs">
         <div class="pull-right">
           <div class="btn-group">
-            <div class="btn-group">
-
+            <div class="btn-group" v-if="actions">
               <button
-                v-if='actions'
                 class="dropdown-toggle btn btn-default has-tooltip js-pipeline-dropdown-manual-actions"
                 data-toggle="dropdown"
                 title="Manual job"
                 data-placement="top"
-                aria-label="Manual job"
-              >
-                <span v-html='svgs.iconPlay' aria-hidden="true"></span>
+                aria-label="Manual job">
+                <span v-html="svgs.iconPlay" aria-hidden="true"></span>
                 <i class="fa fa-caret-down" aria-hidden="true"></i>
               </button>
               <ul class="dropdown-menu dropdown-menu-align-right">
@@ -39,24 +36,21 @@
                   <a
                     rel="nofollow"
                     data-method="post"
-                    :href='action.path'
-                  >
-                    <span v-html='svgs.iconPlay' aria-hidden="true"></span>
+                    :href="action.path">
+                    <span v-html="svgs.iconPlay" aria-hidden="true"></span>
                     <span>{{action.name}}</span>
                   </a>
                 </li>
               </ul>
             </div>
 
-            <div class="btn-group">
+            <div class="btn-group" v-if="artifacts">
               <button
-                v-if='artifacts'
                 class="dropdown-toggle btn btn-default build-artifacts has-tooltip js-pipeline-dropdown-download"
                 title="Artifacts"
                 data-placement="top"
                 data-toggle="dropdown"
-                aria-label="Artifacts"
-              >
+                aria-label="Artifacts">
                 <i class="fa fa-download" aria-hidden="true"></i>
                 <i class="fa fa-caret-down" aria-hidden="true"></i>
               </button>
@@ -64,17 +58,15 @@
                 <li v-for='artifact in pipeline.details.artifacts'>
                   <a
                     rel="nofollow"
-                    :href='artifact.path'
-                  >
+                    :href="artifact.path">
                     <i class="fa fa-download" aria-hidden="true"></i>
                     <span>{{download(artifact.name)}}</span>
                   </a>
                 </li>
               </ul>
             </div>
-            <div class="btn-group">
+            <div class="btn-group" v-if="pipeline.flags.retryable">
               <a
-                v-if='pipeline.flags.retryable'
                 class="btn btn-default btn-retry has-tooltip"
                 title="Retry"
                 rel="nofollow"
@@ -86,9 +78,8 @@
                 <i class="fa fa-repeat" aria-hidden="true"></i>
               </a>
             </div>
-            <div class="btn-group">
+            <div class="btn-group" v-if="pipeline.flags.cancelable">
               <a
-                v-if='pipeline.flags.cancelable'
                 class="btn btn-remove has-tooltip"
                 title="Cancel"
                 rel="nofollow"