Then I'd keep the focus on that.
Then find a way to maintain your bodyweight while getting stronger. Figuring that out from a diet and conditioning/cardio standpoint will probably be helpful in the future anyway.
I'd treat this as a primary goal, and a secondary goal.
Primary goal is to get stronger and hit those lifts. Secondary goal is to get leaner.
When you reach a point where you actually have to make the choice of "be leaner" or "be stronger", go for the "be stronger". But I think you have a long ways before that's actually an either/or. I think you can get leaner (or stay where you are if you'd prefer) and get stronger for awhile.
Personally, diet-wise, as far as not having to really track or think about it in any meticulous fashion... I'd reduce the amount of fast food/processed food, increase the amount of green vegetables (broccoli and spinach [not together], blanched and sauteed in oil with some freshly chopped garlic), reduce alcohol and simple sugar intake and replace with rice/potatoes/pasta/bread and sugar-free condiments, and drink more water (with crystal light/mio/etc.). Also consider eating more eggs.
But that's me and that's what I'd do.
Of course, obviously what you're doing has gotten you stronger, so just make small adjustments to see what works for you to keep you on that path.