Perform Maven release screen should not autorefresh

If "Auto Refresh" is on the Perform Maven Release screen is difficult to operate because it keeps losing custom values entered for SCM login/password when the screen refreshes. I don't think that this screen should be an auto refresh screen.

I've tested/attached a patch that turns off the auto refresh. I did the test against an m2 release plugin checkout taken just before the recent java.net changes.