r859: Merge 2.1:
User interface changes:
* 2 buttons in the plugin strips: One enables and disables the effect,
the other one shows and hides the effect's parameter window.
* Add a preference to display sub-titles.
* Rework the channel picker.
* Improved raw image decoding using a new version of dcraw.c.
(This improves white balance and color interpolation capabilities.)
* More tips.
* Small layout adjustment in the plugin dialog.
* Add a button to swap the width and height entries in the Format,
New Project, Resize track dialogs.
This revision should match GIT::
63251b4a5139bbba7950ddcc136e643057c5b37f.
(The previous commit should match
GIT::
065b2c8cfc76f71a28f7958ac1b295a483d0ce01, btw.)