emit change when adding empty suubs from base language, as this actually adds subtitles
Fixes bug in timeline click
Fix in bubbling strategy on the timeline, for issue #1324
Fix in storedsubtitle updated for unsynced subtitle in timeline, for issue #1325
Merge branch 'gh-1316' into new-editor-primary-staging
Merge branch 'gh-1324' into new-editor-primary-staging
Merge branch 'gh-1325' into new-editor-primary-staging