Avoid crash when setting 'max_console_history-size=None' in rc.conf

[meluchoMZ]

ISSUE TYPE

• Bug fix

RUNTIME ENVIRONMENT

• Operating system and version: Arch kernel 6.8.8-arch1-1
• Terminal emulator and version: konsole 24.02.2
• Python version: 3.12.3
• Ranger version/commit: 38bb890
• Locale: es_ES.UTF-8

CHECKLIST

• The CONTRIBUTING document has been read [REQUIRED]
• All changes follow the code style [REQUIRED]
• All new and existing tests pass [REQUIRED]
• Changes require config files to be updated
  • Config files have been updated
• Changes require documentation to be updated
  • Documentation has been updated
• Changes require tests to be updated
  • Tests have been updated

DESCRIPTION

Allow for maxlen to be None and avoid operating with it in numeric computations. The code of History.add and History.rebase has been adapted in order to take this change into account. History behaves as expected when maxlen=None

• on add operations, the history has no limit
• on rebase operations, the history is rebased successfully

MOTIVATION AND CONTEXT

The changes solve this issue #1895

TESTING

All of the tests of ranger/test were executed and passed