Show credit settlements as positive amounts

src/ccma/ui/claim_tab.py

@@ -12,6 +12,7 @@ from ccma.domain.contributions import (
     allocated_total,
     claim_balance,
     claim_items,
+    claim_settled_total,
     claim_status,
     claim_total,
     credit_allocated_total,
@@ -166,7 +167,7 @@ class ClaimTab(ttk.Frame):
             messagebox.showerror("Forderung konnte nicht geladen werden", str(exc), parent=self)
             return
         total = claim_total(self.claim)
-        paid = allocated_total(self.data, self.claim_id)
+        paid = claim_settled_total(self.data, self.claim)
         balance = claim_balance(self.data, self.claim)
         status = claim_status(self.data, self.claim)
         self.title_var.set(str(self.claim.get("title") or "Forderung"))