Feature request: Allow combining select advancments that are usually done simlutaneously.

[Civitello]

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Current Behaviour: All advancements are displayed and recorded separately.

Desired behaviour: An option to combine selected advancements is present that when selected will display either the harder/second advancement or display them both as a single item.

Reasoning: There are a lot of advancements present in the overlay for most of the run, reducing the amount can make for a quicker time to figure out how the run is progressing.

Example Combinations: Free the End / The Next Generation Spooky Scary Skeleton / Skulls Collected Bring Home the Beacon / Beaconator A Furious Cocktail / How Did We Get Here? A Throwaway Joke / Very Very Frightening

Combining just these 5 Pairs will reduce the count of advancements at the start by 6.25%.