This is not exactly Core, and not exactly Custom. You can add it anywhere, and you could certainly place it in the core with other Gump Entries if you want, but really anywhere is fine.
The reason for this script is that GumpTooltip only accepts an int input, so it can only display the Cliloc text with no parameters. This allows you to add custom text including dynamically generated text. Example in the image attached. Hover over the button, and it can display context appropriate text including line breaks.
The reason for this script is that GumpTooltip only accepts an int input, so it can only display the Cliloc text with no parameters. This allows you to add custom text including dynamically generated text. Example in the image attached. Hover over the button, and it can display context appropriate text including line breaks.