Blender Git Loki

NLA Strip Drawing Tweaks

* Removed frame-number display from NLA strips. Indeed doing so makes
things look cleaner/easier to identify.
* When transforming NLA strips, the "temp-metas" (purple strips) get
their frame extents drawn on either end, like in the sequencer, which
seems to be easier to read than the ones inside the strips.

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The downside of this tweak is that there is no longer any visual
feedback for which strips run reversed instead of forwards, as that
used to be shown using the frame extents stuff.