Backslash character isn't recognised by the replacements system

[IlDucci]

When using the Translation Max Size feature with a .PO file, adding a replacement that contains a backslash () won't get recognised.

I already tried

• Used both local replacements (adding comments to the .po file) and global replacements (Using the Settings of the Project's Component).
• Tried to escape the character (writing \)
• Tried to use quotation marks (writing "\")

To Reproduce the issue

1. Prepare a font typeface, add the proper font settings.
2. Have a source string that has a backslash. An example would be: \E0Welcome.
3. Add a replacement. Example: replacements:"\\E0":"​" (the second quotation marks contain a zero-width space)
4. Translation Max Size graphical preview won't recognise the element, thus, the element to be replaced is still visible.

Expected behavior

Using my example, the element to be replaced should be replaced with zero-width space, and thus, become invisible.

Screenshots

Server configuration and status

Docker-based installation of Weblate, version 4.4.2. For more details, the admin of the server might be needed. An old version of the settings can be found here: #4136 (comment)

Additional context

Not that I can think about at the moment.

[github-actions]

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[github-actions]

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