Revert "Add the ability to see downloads progress with HTPC-Manager using an iframe"

This reverts commit b9196a194c9fbdd7f0e26e5b12489a7cc8aeb876.
Revert "Add the ability to add a movie with HTPC-Manager using an iframe"

This reverts commit eb6502e4193639416313c66104f3f587e2b6e25f.