Rank 500 weapons bumped down to 490

[Gideon404]

@FatsharkStrawHat

• Fixed issues where the max potential for weapon stats could change when empowering a weapon.

Dev Note: Weapon level calculation is now handled in a more reliable manner. Some weapons that had their total stats below 380 at max Empower level will now be at 1 level below max (490 instead of 500) - meaning players will need to go to Hadron’s and empower from 490 to 500.

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