How to upgrade from Fedora 20 to Fedora23 with less stress.

Sorry, can't do that! They discontinued FedUp with Fedora23. So let's upgrade to Fedora 22.

"By the book" instructions:
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-free-fedora-20
rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-rpmfusion-nonfree-fedora-20
fedup-cli --network 22 --product=nonproduct --debuglog /tmp/fedup-20to22.debug.log
Reboot.
rpm --rebuilddb
yum distro-sync --setopt=deltarpm=0
yum install rpmconf
rpmconf -a
yum update
Reboot again.

Now let's fix the problems.
Window themes has vanished? The title bar on all windows is twice the size anyone wants.
Heres the fix:
Create or edit a file called ~/.config/gtk-3.0/gtk.css
@define-color theme_bg_color #3366cc; /* #3366cc; for blue */ /*cc6600; for red *//* #669900; for green */

.header-bar.default-decoration {
padding-top: 0px;
padding-bottom: 0px;
}

.header-bar.default-decoration .button.titlebutton {
padding-top: 0px;
padding-bottom: 0px;
}

/* Get rid of unsightly line in ssd title bar and reduce button padding */
.ssd .titlebar {
border: none;
background-image: linear-gradient(to bottom,
shade(@theme_bg_color, 1.042),
shade(@theme_bg_color, 0.999));
box-shadow: none;
border-top: 1px solid shade(@theme_bg_color, 1.072);
}

.ssd .titlebar:backdrop {
background-image: linear-gradient(to bottom, @theme_bg_color);
}

.ssd .titlebar .button.titlebutton {
padding: 3px;
}

Get rid of annoying screen shield in fedora 22.
bash -c 'su -c "curl http://folkswithhats.org/fedy-installer -o fedy-installer && chmod +x fedy-installer && ./fedy-installer"'
yum install gnome-tweak-tool gnome-shell-extension-user-theme -y
1. Disable Screen Lock
Gnome settings → Privacy → Screen Lock → Off

2. Download this extension - Clone this repo into the correct folder:
git clone https://github.com/lgpasquale/gnome-shell-extension-disable-screenshield.git /home/kevin/.local/share/gnome-shell/extensions/disable-screenshield@lgpasquale.com

3. Reload GnomeShell
Press ALT + F2 then enter r and press Enter.

4. Activate this extension
Tweak Tool → Extension → Disable Screen Lock → On

Other things they messed up:
Nautilis - Files: no longer has an option to bypass the trash, By popular demand they will restore the delete key in Fedora 24.

Gedit: Why did they even touch it? Now the "Open" is on the left, the "Save" is on the right, the search is in some hard to find sub menu. Talk about skrewed up user interface!

I'll stay at Fedora 22 and try the new upgrade method after 24 comes out.

Updated 14 February 2016
by Kevin Gyllenberg.