Hi, is it possible that u can hide this "peaceful mode activation" message popping up like every 2min?

it would be possible but then how do you know when the peaceful mode is active? you get only a message when the state changes from true to false or false to true but when the refinery is continuously running you should not get a message

what about a button somewhere on top left or top right screen where it says Peaceful On/Off?

There you go! I just updated the mod and added icons to indicate peace or war mode for Nauvis and Gleba. I also took the opportunity to make the icon buttons useful by centering the remote view on the specific refinery when you click them.