[#3619] Send message through the IM GUI + indentation

sflphone-client-gnome/src/dbus/callmanager-introspec.xml

sflphone-client-gnome/src/dbus/dbus.c

sflphone-client-gnome/src/dbus/dbus.h

sflphone-client-gnome/src/uimanager.c

sflphone-client-gnome/src/widget/imwidget.c

sflphone-client-gnome/src/widget/imwidget.h

sflphone-common/libs/utilspp/singleton/LifetimeLibrary.cpp

sflphone-common/libs/utilspp/singleton/PrivateMembers.cpp

sflphone-common/src/account.cpp

sflphone-common/src/accountcreator.cpp

sflphone-common/src/audio/alsa/alsalayer.cpp

sflphone-common/src/audio/audiodevice.cpp

sflphone-common/src/audio/audiolayer.cpp

sflphone-common/src/audio/audioloop.cpp

sflphone-common/src/audio/audioprocessing.cpp

sflphone-common/src/audio/audiorecord.cpp

sflphone-common/src/audio/audiorecorder.cpp

sflphone-common/src/audio/audiortp/AudioRtpFactory.cpp

sflphone-common/src/audio/audiortp/AudioSrtpSession.cpp

sflphone-common/src/audio/audiortp/AudioZrtpSession.cpp