Adapt django makemessages command to ensure forward slashes

This adapts submethods of the makemessages command to use generic forward slashes instead of os specific slashes, e.g., backslashes on windows

AKModel/management/commands/makemessages.py

+"""
+Ensure PO files are generated using forward slashes in the location comments on all operating systems
+"""
+import os
+
+from django.core.management.commands.makemessages import Command as MakeMessagesCommand
+
+
+class Command(MakeMessagesCommand):
+    def find_files(self, root):
+        all_files = super().find_files(root)
+        if os.sep != "\\":
+            return all_files
+
+        for file_entry in all_files:
+            if file_entry.dirpath == ".":
+                file_entry.dirpath = ""
+            elif file_entry.dirpath.startswith(".\\"):
+                file_entry.dirpath = file_entry.dirpath[2:].replace("\\", "/")
+
+        return all_files
+
+    def build_potfiles(self):
+        pot_files = super().build_potfiles()
+        if os.sep != "\\":
+            return pot_files
+
+        for filename in pot_files:
+            lines = open(filename, "r", encoding="utf-8").readlines()
+            fixed_lines = []
+            for line in lines:
+                if line.startswith("#: "):
+                    line = line.replace("\\", "/")
+                fixed_lines.append(line)
+
+            with open(filename, "w", encoding="utf-8") as f:
+                f.writelines(fixed_lines)
+
+        return pot_files