fix(container): fixed add value and remove value for env [EE-3839] (#7429)

* fix(style): UI task issues [EE-3839]

app/docker/components/datatables/services-datatable/actions/servicesDatatableActions.html

@@ -3,7 +3,7 @@
     <button
       ng-if="$ctrl.showUpdateAction"
       type="button"
-      class="btn btn-sm btn-light h-fit"
+      class="btn btn-sm btn-light h-fit vertical-center !ml-0"
       authorization="DockerServiceUpdate"
       ng-disabled="$ctrl.selectedItemCount === 0"
       ng-click="$ctrl.updateAction($ctrl.selectedItems)"

app/portainer/components/environment-variables-panel/environment-variables-simple-mode/environment-variables-simple-mode-item/environment-variables-simple-mode-item.html

@@ -52,9 +52,9 @@
   </div>
   <div>
     <button class="btn btn-sm btn-light" type="button" ng-if="!$ctrl.hasValue()" ng-click="$ctrl.onChangeValue('')">
-      <pr-icon icon="'plus'" feather="true"></pr-icon>
+      <pr-icon icon="'plus'" feather="true"></pr-icon> Add value
     </button>
-    <button class="btn btn-sm btn-light" type="button" ng-click="$ctrl.onRemove($ctrl.index)">
+    <button class="btn btn-light" type="button" ng-click="$ctrl.onRemove($ctrl.index)">
       <pr-icon icon="'trash-2'" feather="true"></pr-icon>
     </button>
   </div>