"amnesia" instead of "Home" launcher on the desktop

Originally created by @sajolida on #16799 (Redmine)

In bc022ef7, the “Home” launcher on the desktop is now called “amnesia”.

I prefer “Home” because:

• It’s what we already had and it’s documented like this in many places (and screenshots).
• It’s the name of a place while “amnesia” is the name person, which is worse to label a folder.
• I’m trying to get rid of “amnesia” in #15830.

Also the behavior and the layout of the launchers have change. Are there any technical reason behind that?

Feature Branch: bugfix/16799-hide-home-desktop-launcher