Device manager - current session expandable details (PSG-644) (#9185)

* split current device section into component

* add dropdown button for currentsession device details

* test currentdevicesection

* remove unnecc beforeEach

* update type imports

* i18n and lint

res/css/components/views/settings/devices/_DeviceDetails.pcss

@@ -17,18 +17,20 @@ limitations under the License.
 .mx_DeviceDetails {
     display: flex;
     flex-direction: column;
+    box-sizing: border-box;
 
     width: 100%;
 
+    margin-top: $spacing-16;
     padding: $spacing-16;
     border-radius: 8px;
-    border: 1px solid $system;
+    border: 1px solid $quinary-content;
 }
 
 .mx_DeviceDetails_section {
     padding-bottom: $spacing-16;
     margin-bottom: $spacing-16;
-    border-bottom: 1px solid $system;
+    border-bottom: 1px solid $quinary-content;
 
     &:last-child {
         padding-bottom: 0;