Allow multiple country value paste option to visibility rules

When editing visibility rules, I wish there was a way to add multiple values (separated by commas) like other form options or a pick-list even referencing multiple values. Versus going through the list one by one. If you want to show a hidden field now you have to click through the list to add multiple countries. It'd be nice to save time for example with a list of 25 countries to just paste that instead of drop down list clikc to add, click to add.