Add ransomware directories property to UISchema object

This addition is required to manipulate the UI components in ransomware configuration UI without the need to create object's properties. Otherwise we'd have to create ransomware.encryption.directories in UI schema using code.

monkey/monkey_island/cc/ui/src/components/configuration-components/UiSchema.js

@@ -71,6 +71,13 @@ export default function UiSchema(props) {
         }
       }
     },
+    ransomware: {
+      encryption: {
+        directories: {
+            // Directory inputs are dynamically hidden
+        }
+      }
+    },
     internal: {
       general: {
         started_on_island: {'ui:widget': 'hidden'}