https://customerfx.com/article/adding-row-action-menu-items-to-a-creati… this article tells you how to add items to the row menu, and also that if you override the row menu to add your own it will remove the default ones, so you can just override the row menu with nothing (so no row menu) or with just the ones you want to keep (e.g. just the Open option, removing Delete and Copy to make it ready only).
https://customerfx.com/article/adding-row-action-menu-items-to-a-creati… this article tells you how to add items to the row menu, and also that if you override the row menu to add your own it will remove the default ones, so you can just override the row menu with nothing (so no row menu) or with just the ones you want to keep (e.g. just the Open option, removing Delete and Copy to make it ready only).