Post quota alerts

The most common errors when posting articles on LINE are an insufficient posting quota or exceeding this month's free quota. This update adds real-time quota calculation, checking the remaining quota with LINE before and after posting and at a fixed time every day. If the remaining quota can't cover all recipients, an alert is shown at the time of posting, to make sure messages aren't left unsent.

Fixes

• Posting from mobile might fail to send
• Incorrect deep link title text
• Possible flickering in Live Chat