Refactor column count of person cards in Home view

Having many persons, the cards would take up a lot of space in the Home
view. Now, a horizontal stack allows up to 8 cards.

src/Registry.ts

@@ -265,7 +265,7 @@ class Registry {
    * Each horizontal stack contains a specified number of cards.
    *
    * @param {LovelaceCardConfig[]} cardConfigurations - Array of card configurations to be stacked.
-   * @param {number} columnCount - Number of cards per horizontal stack.
+   * @param {number} columnCount - Maximal number of cards per horizontal stack.
    */
   static stackHorizontal(cardConfigurations: LovelaceCardConfig[], columnCount: number): StackCardConfig[] {
     const stackedCardConfigurations: StackCardConfig[] = [];

src/views/HomeView.ts

@@ -207,10 +207,9 @@ class HomeView extends AbstractView {
         .map((person) => new PersonCard(person).getCard()),
     );
 
-    // FIXME: The columns are too narrow when having many persons.
     return {
       type: 'vertical-stack',
-      cards: Registry.stackHorizontal(cardConfigurations, 2),
+      cards: Registry.stackHorizontal(cardConfigurations, 8),
     };
   }