Add an option to add new recordings to the end of the list

[barryrs]

Add an option to add new recordings to the end of the list.
(facilitates better management of recording prioritization)
(I have my priorities set, adding new recordings to the beginning of the list is irritating.)

Also, make btv show conflicting recording messages in the messages section of the home screen.
I don't use the web interface often, so seeing the yellow error icon would alert me of any conflicts.
(course, if i click on a conflict, bring me to a conflict resolution solution)

Thanks again!