Fixes and SDK update
Do not re add message when re sending after error #LINQT-2597
Stop invalidating ChatProxy on every dataChanged to avoid layoutChanged-driven delegate destruction crash (cherry picked from quanta commit e08610396a89764174bcb3d01a1799e83e561a2d)
disable sending area if chat is read only #LINQT-2605 #LINQT-2606
Display real state of conference info in message notification #LINQT-2607
Add friendListCreated signal
update SDK to 5.5.4