Popover rendering partially off-screen: We already have an open ticket for this.
Re-ordering columns by dragging: This is the first I’ve ever heard of being able to do that, and so I’m not sure where the documentation got that information. I’ll ask around, but I would not expect that to work. To my knowledge there is no way to order the columns of the Alarm Journal Table at this time.
Update:
I verified with Development that this was never something that could be done with the columns. I’ve reached out to the Documentation team and requested it be removed from the documentation. Sorry for the confusion.
Update update: It looks like they’ve removed the erroneous behavior description from the docs.
You can change the columns that are displayed, the order of the columns, and/or the column width in Preview Mode and in a Perspective Session.
Edit: I have just followed kgamble's link above and found that this is now actually correct, as of the version after my current version. Guess I better put "upgrade to latest version of Ignition" a little higher up my to-do list.