Change performer height to be numeric (#3060)

* Make height an int. Add height_cm field
* Change UI to use height_cm
* Use number fields for height/weight
* Add migration note

pkg/sqlite/sql.go

@@ -178,7 +178,7 @@ func getIntWhereClause(column string, modifier models.CriterionModifier, value i
 		return fmt.Sprintf("%s > ?", column), args
 	}
 
-	panic("unsupported int modifier type")
+	panic("unsupported int modifier type " + modifier)
 }
 
 // returns where clause and having clause