How can I make it so I can easily select 75hz as my monitor refresh rate in KDE?

FTR, I know I can fire some commands into the prompt to make this happen, but I am trying to get away from doing these one off alterations of the OS and looking for more complete solutions. I want to make it so I can physically click the refresh rate drop down in the KDE-Displays window and select 75hz.

Also, I'd like to know if games that I am playing through Wine/Lutris/Proton will detect that I now have a 75hz capable screen like it would on Windows.

I am using Kubuntu 18.04, R7-1700 / rx480 and I believe I am using the open source gpu drivers.

Thanks in advance!