Connection in files

Added "Connection.Connect()" before each SQL call in:
Boarder_List
Food_Screen
Add_Boarder
BoarderOwners
Revert "Connection in files"

This reverts commit 03b71c2f49969a520cd6e3cd68133dd224d47e38.
Revert "Revert "Connection in files""

This reverts commit ed943ddd52a6f643399bd56106293cea7bfa7805.