Expanding / collapsing Sitecore content tree nodes on double click

The Sitecore CMS provides very high level of usability, so people without special training can get used to it very quickly. But there is one thing in content tree, that behaves differently in a Windows Explorer. Let's see the following example:

If you double-click on the "Inner folder 1" folder name, it will expand / collapse. But how about Sitecore?

Hmm... double click does nothing, item simply gets refreshed.