tested version with most of the final functionality. Still a few known issues, like dragging to a row that extends to multiple lines

row_edit_popup.cs

@@ -39,10 +39,15 @@ public partial class row_edit_popup : PanelContainer
 	}
 	public void Reset()
 	{
+		Hide();
 		GetNode<ColorPickerButton>("%ColorPickerButton").Color = DefaultColor;
 		GetNode<TextEdit>("%RowTextEdit").Text = "";
 		EditingRow = null;
-		Hide();
 		this.GetParentOfType<game>().MenuClosedEnableInteraction();
 	}
+	public void DeleteRow()
+	{
+		EditingRow.QueueFree();
+		Reset();
+	}
 }