Replace the hardware menu button with the task switcher. It also forces the device to show the on screen menu button (also called action overflow button).
Functionality is identical to the galaxy S5.
Old version threads:
Removed Launcher icon, settings can now only be accessed using the Xposed app
Fixed bug reported on galaxy s4
Long pressing the menu button can be mapped back to opening the menu
Forcing the apps to show the on screen menu button is done using a white list