Remove Call and notices logs from db
Delete empty chat rooms after requesting it
Option of showing/hidding empty chat rooms
Many fixes on notifications count, imdn states, synchronizations behaviors, mouse cursor, etc.
Fix crashes
Fix timeline times
* Activate mipmap on MacOs to avoid Qt crashes
* Use 5.14.2 for Windows
* Request Qt 5.12 as a minimal version and cmake 3.9 (in order to embed big resources)
* Remove build on Debian8 as it has Qt 5.10
* Add default fonts for supported languages
* Use a build parameter to set `dpiawareness` (Windows)
* Add OTF support, in addition of TTF
* Explicit the answer to video request : Fix on not showing video when accepting a second request
* Use UTF8 when chatting and notifications to show all languages/symbols
* Fix SIP display on call view
* Fix a typo on a variable in call view (might lead to get transparent view)
