About the new page swiping feature
v105 introduced a new feature to swiping within Groups, Contacts and Favorites pages. Some people must like it. While if you prefer old behaviour, you can simple check the option Preferences->Behaviour->Contacts->Swipe Item. Note that this is a new option compare to “Swipe Item” for Dialer.
Small tips: Swiping the bottom action bar can also achieve page swiching.