Ine1f3996d74, logic for changing metastrip start and end frame based on contained strips was removed. This was done intentionally and incorrect functionality wasn't noticed as drawing code reflected seemingly correct state. Original code was mostly correct, because meta strip doesn't store its internal start and end points. This code was restored with minor modifications so function `SEQ_time_update_sequence()` is fully self contained as it is used not only by transform operator. In addition, drawing glitches that happen when meta content is outside of meta boundaries were fixed. These glitches were not caused bye1f3996d74. Reviewed By: sergey Differential Revision: https://developer.blender.org/D11215