release 2.6.11
+ preferences for network_buffer_size option
Merge remote-tracking branch 'orig/master'
Merge remote-tracking branch 'upstream/gtk3'
Fix fatal when album image is None
Merge branch 'gtk3'
Merge remote-tracking branch 'remotes/zavlab/origin/master'

Conflicts:
	src/scripts/launchpad_upload.sh
Merge remote-tracking branch 'simokhov/master'
Merge remote-tracking branch 'popsul/master'
"Copy link" drop-down menu item
Merge remote-tracking branch 'foobnix/master' into gtk3
Merge remote-tracking branch 'simokhov/master' into gtk3
Fix bug - popup tray menu appeared in top-left corner of screen (in 3.10.x)