||If deleting is available, the user have to confirm it by clicking "yes" in the dialog asking before deleting.
||To delete network from the memory, there are two necessary steps :
1. Delete the correct one (selected) from the linked list
2. Select the new one network as active one
1. - user has already selected a network (if there is none, this process does not start). So program has an index of network in the linked list. This network is separated from the list. Pointers are relinked.
2. - if there is a net available, program selects automatically the new one - at the same place in the list(index) or the last one.
Function Form1.MI_Delete_Click(...) and the functions among changing the selected item in the list of networks.