I have a strange row in interface list in WebFig -> Interfaces.
It shows
See attached screenshot.
Would appreciate it if someone explain what could it mean.
RouterOS v7.7rc3

Set "inline comments" to "on"

It's the default config (=defconf) for the line which follows.
And as mentioned by BartoszP, clearly visible when you set comments to inline.
You can also see it when you select bridge and go to the comment section.

It's left over from default config. Unless you're using Quickset to change things in future, you can delete/remove the comment too.