Facets filtering by product properties

[connecticus]

Hello, I use facets filtering by product properties. Everything is nice, except one thing. After some filtered values of properties are chosen and page is reloaded I see filtered products. The other values of those properties, that were nor chosen, disappear like they never existed. It's inconvenient, because the user may forget about all possible values to choose. The right way is to show the list of all values (chosen are checked), then user may just unclick chosen ones and choose another ones.

Thank you!