LinQ 4.1.5 released!

ChangeLog:

* Add one option, chat dialog is opened initially minimized.
* Scroll to bottom when chat dialog is opened with history messages.
* Pre-populate all possible services in registration, search, and join room dialog.
* Add 'make a conference' tool button in chat dialog.
* [win] Flash window for three times instead of just once.
* [win] Fix chat window still gets focus even if it is initially minimized.
* Fix pressing 'Enter' key in login dialog will not login.
* Fix online sound notification bug.