Add Custom option to Display Position when in Follow Mode

[lazyboy0172]

Currently, the Follow mode of XR Gaming lets users choose a display position for their smaller display size. Currently we can select between 'Center', 'Top left', 'Top right', 'Bottom left', and 'Bottom right'. I would like to see a custom option added to allow a user to choose the appropriate anchor point for themselves. Personally, I prefer a 'top center' which would allow me to shrink the display and minimize left/right/bottom obfuscation which occurs in my glasses without also losing some of the top when selecting the current 'center' mode. We probably wouldn't want to add every option under the sun though, so a 'custom' option that gives the user the ability to choose a specific location may be best.