Add w3m_offset_x and w3m_offset_y options

[hoshino873]

ISSUE TYPE

• Improvement/feature implementation
• Breaking changes

RUNTIME ENVIRONMENT

• Operating system and version: Gentoo Linux
• Terminal emulator and version: xfce4-terminal
• Python version: 3.11.7
• Ranger version/commit: master (136416c)
• Locale:

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

Added w3m_offset_x and w3m_offset_y options instead of w3m_offset because the preview image was misaligned in xfce4-terminal with menubar.

Here is the result of setting like this:

set w3m_offset_x 1
set w3m_offset_y 28

In fullscreen mode:

MOTIVATION AND CONTEXT

TESTING

IMAGES / VIDEOS