Handle icon-reorder better on 1dppx screens.
Shave a few lines.
Count unread posts if desktop notifications are enabled.

Also fix missing Conf check, and return too early in counting replies to you.
Minor tweaks here and there.
Warn with a desktop notification when we're running low on cached captchas.

Also increase delay to close the notifications from 5 to 7 seconds.
Close #1250.
Sightly smaller header bar.
Refine QR previews dragging.
offset -> layer

Because Fx doesn't have offsetX/Y.
Refactor file input handling.
Un-hide the QR and focus the captcha input when clicking on the low-captcha notification.