added right and left arrow shortcuts for container submenu tabs

change focus to whole panel element after right arrow press, allows navigation without pressing tab

src/js/popup.js

@@ -543,6 +543,7 @@ Logic.registerPanel(P_CONTAINERS_LIST, {
           previousElement.focus();
         }
       }
+
       switch (e.keyCode) {
       case 40:
         next();
@@ -550,6 +551,26 @@ Logic.registerPanel(P_CONTAINERS_LIST, {
       case 38:
         previous();
         break;
+      case 39:
+        {
+          const showTabs = element.parentNode.querySelector(".show-tabs");
+          if(showTabs) {
+            showTabs.click();
+          }
+          const panel = document.querySelector("html");
+          if(panel) {
+            panel.focus();
+          }
+          break;
+        }
+      case 37:
+        {
+          const hideTabs = element.parentNode.querySelector(".panel-back-arrow");
+          if(hideTabs) {
+            hideTabs.click();
+          }
+          break;
+        }
       default:
         if ((e.keyCode >= 49 && e.keyCode <= 57) &&
             Logic._currentPanel === "containersList") {