Blender Git Loki

UI: layout tweaks for headers.

* Move all copy & paste operators into the menus. There was no real reason
why these particular operators should be in the header and not in the menus,
like all other operators
* Move ?Update Automatically? toggle from UV/Image Editor header into menu.
* Move the pin toggle next to the ID blocks, because it is related.
* Move OpenGL render from sequence header into View menu.
* Sequence editor display mode and channels are now not expanded.