Fix translation name: InlineBezierCurveEditor -> InlineTimingFunctionEditor

Quick fix to change the `strings.js` to use `INLINE_TIMING_EDITOR` instead of `INLINE_BEZIER_EDITOR`.

I mentioned this in [this comment](https://github.com/adobe/brackets/pull/5600#issuecomment-26823481).
#5600


@redmunds Please review