Find commands by name in blender 2.80 beta? Find commands by name

The question is very similar - where is this search popup in 2.80 beta and how to call it? Suggested Spacebar doesn't work

I opened Preferences and found a search popup in it with F3 keyboard button. 

But this menu is different or I don't understand how it work...

Example

Loop Cut and Slide in Blender 2.74



Command "Loop Cut and Slide" exists but search menu called with F3 doesn't contain it (in other words I can't find a command from this picture). Or is it just a bug?
Are you sure you have the mesh selected and that you are in "edit mode"?
Otherwise the operator will not show up.