PersonListCard.fxml: Remove unneeded child HBox

The id and name label in PersonListCard is wrapped around two parent
HBoxes.

This is not necessary.

Let's remove the unneeded child HBox.

src/main/resources/view/PersonListCard.fxml

@@ -19,15 +19,13 @@
         <Insets bottom="5" left="15" right="5" top="5" />
       </padding>
       <HBox spacing="5" alignment="CENTER_LEFT">
-        <HBox>
-          <Label fx:id="id" styleClass="cell_big_label">
-            <minWidth>
-              <!-- Ensures that the label text is never truncated -->
-              <Region fx:constant="USE_PREF_SIZE" />
-            </minWidth>
-          </Label>
-          <Label fx:id="name" text="\$first" styleClass="cell_big_label"/>
-        </HBox>
+        <Label fx:id="id" styleClass="cell_big_label">
+          <minWidth>
+            <!-- Ensures that the label text is never truncated -->
+            <Region fx:constant="USE_PREF_SIZE" />
+          </minWidth>
+        </Label>
+        <Label fx:id="name" text="\$first" styleClass="cell_big_label"/>
       </HBox>
       <FlowPane fx:id="tags" />
       <Label fx:id="phone" styleClass="cell_small_label" text="\$phone" />