Konova code improvements

* improves rendering of codes as string (short names will be used if existing)
* reduces selectable konova codes to leafs (as discussed with experts)
* automatically resizes the width of modal form fields to w-100
* adds/updates translations

codelist/models.py

@@ -40,9 +40,10 @@ class KonovaCode(models.Model):
     )
 
     def __str__(self):
-        if self.is_leaf and self.parent:
-            return "{} > {}".format(self.parent.long_name, self.long_name)
-        return self.long_name
+        if self.short_name:
+            return "{} ({})".format(self.long_name, self.short_name)
+        else:
+            return self.long_name
 
 
 class KonovaCodeList(models.Model):