Elm_Prefs: use Evil API
Elm_Prefs: use Evil API

The current test is not sufficient to check if the path is relative or
not. Use Evil API instead

@fix

tasn/elementary,tasn/elementary,FlorentRevest/Elementary,FlorentRevest/Elementary,rvandegrift/elementary,rvandegrift/elementary,FlorentRevest/Elementary,tasn/elementary,FlorentRevest/Elementary,tasn/elementary,rvandegrift/elementary,rvandegrift/elementary,tasn/elementary