Nutrition plan: pick correct body weight entry

[rolandgeider]

In the get_nutritional_values method of NutritionPlan the per-kg-calculation uses the user's last weight entry. While this is correct when adding meals to the plan, it can be wrong when opening the plan later (the user's weight changed). This should be changed so that the weight entry closest to the plan's date should be used.

[avinsrid]

I can take a look at this

~Avinash

[rolandgeider]

👍

[rolandgeider]

Hey @avinsrid, how is it going?