Problem with Unity Launcher icon size in freshly installed Ubuntu 15.04

[tig2]

I have been installing on a freshly formatted partition and adjusting Ubuntu 15.04 in the last couple of days, and most of the the things were going well. Along the way I noticed one problem, which is not crucial functionally, but kind of irritating. I can easily change the size of icons in Unity Launcher using the internal settings or Unity Tweak Tool and it works as it is supposed to on the Launcher left panel. However, the Search panel keeps all its icons at the maximum 64 size and doesn't change it no matter what I tried (even in the Guest account it stays the same). They are so big, that look ugly and I prefer not even go there - see image. Does anybody have any suggestions how I can fix it? Thanks.

[mc4man]

The only way you could is to make only smaller icons available for each app, hardly worth the effort (and smaller icons likely would still occupy the same area.