[Feature request?] Custom Groups saving location

[hermaherp]

Is less about a feature request and more about suggesting saving custom groups separate from the main extension data, since I've happened to have Playnite crashing on me twice or thrice over the course of 2 years (for a bunch of random reasons under normal usage circumstances), and have noticed that each time it happens, DuplicateHider's custom groups disappear

Now that it has happened again and seeing this is a consistent behavior, I wanted to see if there was some leftover files to recover these groups, but found out that the info is stored in the same json as the rest of the options, which leads me to believe that in the case of a fatal failure, extension settings regenerate and with it custom groups are deleted. I don't know if it is possible to do, but I'd suggest storing the custom group data in a second file as a database as a means of security to ensure said data is not lost