Fixes :

improve unencrypted conversations warning indicator #LINQT-2061

allow user to choose an address for sending message when multiple addresses in contact #LINQT-2054

verify friend has a core to avoid crash in liblinphone #LINQT-1933

wait for window to be active before calling markAsRead (fix #LINQT-2048)

fix button text color (fix #LINQT-1832)

change format for mkv #LINQT-2056

Registration : check phone number format #LINQT-2044

fix window closing even if a new call is started #LINQT-2055

display popup to delete meetings on right click in meeting list item (allow to delete canceled meetings which cannot be displayed in the right panel)