Add event handler for checkbox changes to manage refresh button state

- Implemented a new event listener for checkboxes with class 'g-checkbox'.
- The listener updates the state of the '.multi-refresh' button based on the checked status of the checkbox.
- Ensured that the refresh button is enabled or disabled appropriately when checkboxes are checked or unchecked.

layout/style-scss/style.scss

@@ -540,6 +540,11 @@ input[type="radio"] {
 .btn-primary {
   background-color: #334c75;
   border-color: #334c75;
+
+  &.btn-disabled {
+    opacity: .5;
+    pointer-events: none;
+  }
 }
 
 .btn-system {