handle spot drawing even if the source is not in the visible area
Store last selected preset name.

This will be used to be able to update a preset.
Skip prefix before any tag when looking for a preset name.
Add support for updating a preset with current values.
Merge branch 'add-update-presets' of https://github.com/TurboGit/darktable
Merge remote-tracking branch 'origin/spot'
spots: nobrainer :)
noise profile: updated eos 5d mark 2 to contain 1/3rd stops
noise profile: more interesting comparison graphs.