FamilyGroup Report crash

Python's sort routine gratuitously converts the bytearrays returned by
ICU::Collator::getByteArray to a string when storing it. This resulted
in a TypeError when attempting to compare a just-returned bytearray
with a stored string.

We work around this by converting the bytearray into its hexadecimal
representation and then decoding that into a string.

Fixes #10077.

gramps/gen/utils/grampslocale.py

@@ -32,6 +32,7 @@ import codecs
 import locale
 import collections
 import logging
+from binascii import hexlify
 
 LOG = logging.getLogger("." + __name__)
 LOG.propagate = True
@@ -856,8 +857,9 @@ class GrampsLocale(object):
         """
 
         if HAVE_ICU and self.collator:
-            #ICU can digest strings and unicode
-            return self.collator.getCollationKey(string).getByteArray()
+            # ICU can digest strings and unicode
+            # Use hexlify() as to make a consistent string, fixing bug #10077
+            return hexlify(self.collator.getCollationKey(string).getByteArray()).decode()
         else:
             if isinstance(string, bytes):
                 string = string.decode("utf-8", "replace")