Fix hardware status expand button accessiblity

- Aria label added to provide screen readers context for button action
- Title added to chevron icon to display label on hover

Signed-off-by: Dixsie Wolmers <dixsie@ibm.com>
Change-Id: Ib8c0cef36d7aa61e0b4b0ac7fdabffb7e8a0a17a
diff --git a/src/views/Health/HardwareStatus/HardwareStatusTablePowerSupplies.vue b/src/views/Health/HardwareStatus/HardwareStatusTablePowerSupplies.vue
index 0eb2f60..51b579e 100644
--- a/src/views/Health/HardwareStatus/HardwareStatusTablePowerSupplies.vue
+++ b/src/views/Health/HardwareStatus/HardwareStatusTablePowerSupplies.vue
@@ -34,9 +34,10 @@
         <b-button
           variant="link"
           data-test-id="hardwareStatus-button-expandPowerSupplies"
-          @click="row.toggleDetails"
+          :aria-label="expandRowLabel"
+          @click="toggleRowDetails(row)"
         >
-          <icon-chevron />
+          <icon-chevron :title="expandRowLabel" />
         </b-button>
       </template>
 
@@ -96,10 +97,16 @@
 import TableSortMixin from '@/components/Mixins/TableSortMixin';
 import Search from '@/components/Global/Search';
 import SearchFilterMixin from '@/components/Mixins/SearchFilterMixin';
+import TableRowExpandMixin from '@/components/Mixins/TableRowExpandMixin';
 
 export default {
   components: { IconChevron, PageSection, StatusIcon, Search, TableCellCount },
-  mixins: [TableDataFormatterMixin, TableSortMixin, SearchFilterMixin],
+  mixins: [
+    TableRowExpandMixin,
+    TableDataFormatterMixin,
+    TableSortMixin,
+    SearchFilterMixin
+  ],
   data() {
     return {
       fields: [