Application Icon Ordering in Main Menu I have Android Lollipop 5.1 running on my Nexus 5 phone. Whenever I install or uninstall an application, the order of all the app icons is re-sorted in alphabetical order. Is there any way in which we can configure this ordering mechanism?
AFAIK the default app drawer on the Nexus 5 always sorts the applications in alphabetical order only. So if you would want to order them in a different manner, you would have to use a 3rd Party launcher app(Go Launcher, Aviate etc.)

Here is a link to 3rd party launchers that are available on the Play Store: 
3rd party Launchers