Bug with welcome message and markdown

[Heacien]

If the welcome message is like Welcome to **$SITENAME$**! the bold markdown prevents the parameter to get replaced.

Maybe I can solve this bug on my own - if I got some spare time left.

[oliversalzburg]

The majority of the work to be done is probably around https://github.com/Benjol/SE-AutoReviewComments/blob/master/src/autoreviewcomments.user.js#L356-L366

Create a fork, make your fixes in a branch, push the branch, create a pull request here and it'll probably make itself into the next release.

[Benjol]

It's not the bold. The Welcome message is quite simply not processed for tags.
This change will be slightly complicated by the fact that you need to display the unprocessed welcome message when editing it.