Added --content-only flag for borg 1.2.4 in diff view

[jetchirag]

Description

Borg 1.2.3 -> 1.2.4 introduced --content-only which crashes vorta on diff action when files have metadata changed. This PR adds --content-only flag to diff command for this borg version.

Related Issue

Fixes #1668

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have read the CONTRIBUTING guide.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

I provide my contribution under the terms of the license of this repository and I affirm the Developer Certificate of Origin.

[m3nu]

I have confirmed the bug and proposed fix locally. Good job on this, @jetchirag 👏

[real-yfprojects]

If I am not mistaken the --content-only flag disables the mode change type too. However this is currently used in the diff view. Why don't we implement code for parsing ctime and mtime changes instead?

[m3nu]

That would be even better. This PR is mostly as quick fix, so we can support Borg 1.2.4 with the next release. Wanna add an issue for that and mark it as "help needed" or something?

[real-yfprojects]

^ Done!