[WIP] Fix issue with comments not saving in read-only pad

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>comment in a read-only Pad?</issue_title>
<issue_description>How do you think? Could it be possible to comment in a read-only Pad?
They are stored to database, too

key:

comments:padID 

value:

"commentId":{ "author": data.author, "name": data.name, "text": data.text, "changeTo": data.changeTo, "changeFrom": data.changeFrom, "timestamp": new Date().getTime()}

(commentManager.js, line 62, right?)

But in

key:

pad:padId

there won't be the comment (commentId), so after reload the pad the comment won't be shown.
Is that the consciously behavior? Does anyone know a way / fix to save comments on read-only pads?
</issue_description>

Comments on the Issue (you are @copilot in this section)

@JohnMcLear You can already comment in a read only pad afaik. @JohnMcLear Or is it you can see them but not reply? @JohnMcLear I swear I added support for this.. Did you checkout latest version? @JohnMcLear Mheh, will take a look tonight or tomorrow. @JohnMcLear https://github.com//pull/39 @JohnMcLear I'm not gonna get time to look at this now until Late August, apologies! @JohnMcLear Just allow comments through as an allowed message type and add the comments container to the read only view. @JohnMcLear @gulaschskanone I'm available as a gun for hire if you want to get this done sooner than I get spare time? @JohnMcLear @thmo it's probably not a huge job to fix, assuming this is for a commercial project did you want to setup a bounty so we can get more eyes on it else it's gonna just fall naturally on our roadmap. @JohnMcLear Ah okies, well when we're doing our next big push on ep_comments we will try address these bugs. Fair point RE the security issue, that should be getting rejected! @JohnMcLear Take a stab!