can only show one banner per release

[glasser]

banner code is buggy:

    var lastShown = new Date(row.lastShown);
    return lastShown < bannerDate;

row.lastShown is something like "2014-12-23T01:31:14.612Z" and that doesn't actually convert into Date.

[adnissen]

In my experimentation it did indeed convert into a proper date (Mon Dec 22 2014 20:31:14 GMT-0500 (EST)), but adding Date.parse might not be a bad idea.

[glasser]

Ah, I was in a hurry when I noticed this: the bug is actually that the double quotes listed above are actually in the database, but I don't parse that correctly. @adnissen thanks for #3355 but that doesn't actually address the issue.