Fix requirement external toggle when deselecting and reselecting node

Issue-ID: SDC-3501
Signed-off-by: davsad <david.sadlier@est.tech>
Change-Id: Ib4b1913adc54fb15277af324e8eaf5bbd82c0f95
diff --git a/catalog-ui/src/app/utils/constants.ts b/catalog-ui/src/app/utils/constants.ts
index 230cb54..0df1a65 100644
--- a/catalog-ui/src/app/utils/constants.ts
+++ b/catalog-ui/src/app/utils/constants.ts
@@ -348,6 +348,7 @@
   static ON_PALETTE_COMPONENT_SHOW_POPUP_PANEL = 'onPaletteComponentShowPopupPanel';
   static ON_PALETTE_COMPONENT_HIDE_POPUP_PANEL = 'onPaletteComponentHidePopupPanel';
   static ON_COMPONENT_INSTANCE_NAME_CHANGED = 'onComponentInstanceNameChanged';
+  static ON_COMPONENT_INSTANCE_REQUIREMENT_EXTERNAL_CHANGED = 'onComponentInstanceRequirementExternalChanged'
   static ON_ZONE_INSTANCE_NAME_CHANGED = 'onZoneInstanceNameChanged';
   static ON_DELETE_COMPONENT_INSTANCE = 'onDeleteComponentInstance';
   static ON_DELETE_ZONE_INSTANCE = 'onDeleteZoneInstance';