feat: Added column card counts

Please don't "fix" the "<no_cards> cards" alignment, after adding column collapsing feature it will look good :D

client/src/components/List/List.jsx

@@ -117,6 +117,10 @@ const List = React.memo(
                     </Button>
                   </ActionsPopup>
                 )}
+                <div className={styles.cardsCount}>
+                  {cardIds.length}&nbsp;
+                  {cardIds.length !== 1 ? t('common.cards') : t('common.card')}
+                </div>
               </div>
               <div
                 ref={listWrapper}

client/src/components/List/List.module.scss

@@ -39,6 +39,11 @@
     min-height: 1px;
   }
 
+  .cardsCount {
+    color: #798d99;
+    font-size: 12px;
+  }
+
   .cardsInnerWrapper {
     max-height: calc(100vh - 268px);
     overflow-x: hidden;

client/src/locales/en/core.js

@@ -158,6 +158,8 @@ export default {
       version: 'Version',
       viewer: 'Viewer',
       writeComment: 'Write a comment...',
+      card: 'card',
+      cards: 'cards',
     },
 
     action: {