#11 "Insert new after X" is bugged

[s3445816]

The "Insert new after X" (X stand for the Number of a line) does not automatically update the new position and associated number of a line, make for some issues such as when line 3 can go before line 2 or multiple line of the same number. This issue only resolves itself after a "Deleted selected subtitle" (the X button). Picture for clarification below.
http://i.imgur.com/2kIcBoY.png

[dayglo]

the subtitles are now recounted once the insert button is clicked