Fix notification on gnome shell: make them resident and use seafile icon
Fix notification on gnome shell: make them resident and use seafile icon

lucius-feng/seafile-client,wgaalves/seafile-client,daodaoliang/seafile-client,haiwen/seafile-client,ggkitsas/seafile-client,wgaalves/seafile-client,lucius-feng/seafile-client,losingle/seafile-client,cloudcopy/client,daodaoliang/seafile-client,haiwen/seafile-client,lucius-feng/seafile-client,cloudcopy/client,losingle/seafile-client,losingle/seafile-client,ggkitsas/seafile-client,lucius-feng/seafile-client,losingle/seafile-client,cloudcopy/client,ggkitsas/seafile-client,wgaalves/seafile-client,daodaoliang/seafile-client,haiwen/seafile-client,wgaalves/seafile-client,daodaoliang/seafile-client,haiwen/seafile-client,ggkitsas/seafile-client,cloudcopy/client