Add an "Access to Folder" or move it to the world manager page of launcher

[VELD-Dev]

As explained in the title, add a button to access the folder of the save directly from the launcher, for example into the save settings. I think it would greatly improve navigation to save files, and above this, it would be much better if it's a button on each server/save in the manager, it would automatically open this save. Maybe an idea for the next launcher ? I think this would be an interesting improvement for users and for interface simplicity