FlexLogger: Let me cancel / revert channel modifications

[MichaelBalzer]

There's no option to cancel changes made to a channel in FlexLogger. If I edit or change a series of parameters, but want to revert to the previous settings, there is no option to do so. I then need to re-enter what was there (and hope I don't forget what it was), or mash Ctrl+Z and hope I undo the correct number of steps.

(Also pressing Esc on this window should perform a cancel operation and close the window).