Collection children: forget already loaded items for a slim navigation of collection children.

src/Umbraco.Web.UI.Client/src/packages/core/tree/tree-item/tree-item-children.manager.ts

@@ -188,6 +188,12 @@ export class UmbTreeItemChildrenManager<
 	 * @memberof UmbTreeItemChildrenManager
 	 */
 	public async loadChildren(): Promise<void> {
+		const target = this.targetPagination.getBaseTarget();
+		/* If a new target is set we only want to reload children if the new target isn’t among the already loaded items. */
+		if (target && this.isChildLoaded(target)) {
+			return;
+		}
+
 		return this.#loadChildren();
 	}
 
@@ -244,7 +250,7 @@ export class UmbTreeItemChildrenManager<
 							? this.targetPagination.getNumberOfCurrentItemsBeforeBaseTarget()
 							: this.#takeBeforeTarget !== undefined
 								? this.#takeBeforeTarget
-								: 5,
+								: this.targetPagination.getTakeSize(),
 						takeAfter: reload
 							? this.targetPagination.getNumberOfCurrentItemsAfterBaseTarget()
 							: this.#takeAfterTarget !== undefined

src/Umbraco.Web.UI.Client/src/packages/core/tree/tree-item/tree-item-expansion.manager.ts

@@ -93,13 +93,7 @@
 				if (currentBaseTarget && !target) {
 					return;
 				}
 
-				/* If a new target is set we only want to reload children if the new target isn’t among the already loaded items. */
-				const targetIsLoaded = this.#childrenManager.isChildLoaded(target);
-				if (target && targetIsLoaded) {
-					return;
-				}
-
 				// If we already have children and the target didn't change then we don't have to load new children
 				const isNewTarget = target !== currentBaseTarget;
 				if (isExpanded && this.#childrenManager.hasLoadedChildren() && !isNewTarget) {

src/Umbraco.Web.UI.Client/src/packages/documents/documents/tree/tree-item/document-tree-item.context.ts

@@ -40,7 +40,7 @@ export class UmbDocumentTreeItemContext extends UmbDefaultTreeItemContext<
 				this.hasCollection,
 				(hasCollection) => {
 					if (hasCollection) {
-						this._treeItemChildrenManager.setTargetTakeSize(2, 2);
+						this._treeItemChildrenManager.setTargetTakeSize(1, 1);
 
 						this.observe(
 							this.hasActiveDescendant,