Add verbose_name_plural to models

- `Category`,
- `FundingCategory`,
- `MusicFocus`

program/models.py

@@ -68,6 +68,7 @@ class Category(models.Model):
 
     class Meta:
         ordering = ("name",)
+        verbose_name_plural = "Categories"
 
     def __str__(self):
         return self.name
@@ -94,6 +95,7 @@ class MusicFocus(models.Model):
 
     class Meta:
         ordering = ("name",)
+        verbose_name_plural = "Music Focus"
 
     def __str__(self):
         return self.name
@@ -107,6 +109,7 @@ class FundingCategory(models.Model):
 
     class Meta:
         ordering = ("name",)
+        verbose_name_plural = "Funding Categories"
 
     def __str__(self):
         return self.name