Nick's Fish House & Grill in Port Covington will become the latest property to change hands in an area that has seen more than $90 million of investment in just the last year. And documents show the sale may be linked to an investment firm tied to Under Armour CEO Kevin Plank. The restaurant's prospective owners have filed for a liquor license transfer through the city's liquor board. A manager at the restaurant on Thursday confirmed that the restaurant is in the process of being sold. The manager…