Ability to set sort order of comments at site-level

Please keep the comments in Jira as they were. The change of order is far too confusing, especially when people reference a comment "above" (Are they a time traveller?)

If it must stay fix these things:

• One setting to rule them all, not a per-ticket configuration
• Default configuration is as it was (oldest on top)
• Fix the bug when ordering them oldest on top it should load the comments correctly. It will load the first comments, rather than the most recent

Basically, put it back.

Cheers.