Add NSOutlineView extension methods: canSelectItem and selectItemAndScrollToVisible.

Frameworks/RSCore/RSCore/NSOutlineView+Extensions.swift

@@ -159,9 +159,28 @@ public extension NSOutlineView {
 		guard let item = item(atRow: row) else {
 			return false
 		}
+		return canSelectItem(item)
+	}
+
+	func canSelectItem(_ item: Any) -> Bool {
+
 		let isSelectable = delegate?.outlineView?(self, shouldSelectItem: item) ?? true
 		return isSelectable
 	}
+
+	func selectItemAndScrollToVisible(_ item: Any) {
+
+		guard canSelectItem(item) else {
+			return
+		}
+
+		let rowToSelect = row(forItem: item)
+		guard rowToSelect != -1 else {
+			return
+		}
+
+		rs_selectRowAndScrollToVisible(rowToSelect)
+	}
 }