Remove now unused definition.
Add support for selection the whole history in lightable mode.

Using key accel ctrl-shift-c one can now select the whole history.
Display in dialog only last active ops in history.
Makes copy ctrl-c and copy history parts ctrl-shift-c.
Rename select all button to copy all.
Add support for pasting only parts of the ops.
Add button for the partial copy/paste.
Rework copy/paste history dialog.

We have now a cancel button and a select all and select none buttons.
Closer to what others applications do.
usermanual: add documentation for module dithering
Fix picasa export parallelism.

Only a single image can be uploaded at a time.
Do not export photo on Flickr concurrently.
Merge branch 'copy-history-parts-enhancements' of https://github.com/TurboGit/darktable
align copy/paste buttons vertically.
noise profile: presets for pentax k-x by supersubsexy.
noise profile: fixed nex-6 metadata, so it's not applied to nex-3
noise profile: unified nex-* naming.
Merge branch 'picasa-export-parallelism' of https://github.com/TurboGit/darktable
collect: fix some indentation.
collect: make recently used collections + collect interact nicely again.

before it didn't update the collect gui when switching collections via
the recently used collections module.
collect: mute debug output.