More verbose output for modules/controlpanel.cpp's DelNetwork / AddNetwork commands

I made a few minor modifications to controlpanel.cpp which increases verbosity of output (which is good for administrators).

For example:
Command: AddNetwork TestUser TestNetwork
Old Output: Network added [TestNetwork]
New Output: Network [TestNetwork] added for user TestUser.

Command: DelNetwork TestUser TestNetwork
Old Output: Network deleted [TestNetwork]
New Output: Network [TestNetwork] deleted for user TestUser.