🍔 Hijack 2.12 - Burger menus and selecting the default tab

**Features** * Can now select the default tab for chapters. * Chapters now have a burger menu at the top of the controller panel. **Improvements** * Switched chevron image for arrow svgs in the controller footer. **Bugfix** * formatting of subtitles (line height) * subtitles not appearing on mobile when selected * potential layout issues with video player and subtitle controls on mobile (around iPhone SE sizes) * subtitle track attached to 1 video showing on additional videos * subtitle track not stopping/not removed when video is changed. ![Burger Menu.png](BASE/products/125966129/changelog/10536/inline-bd1f86c4ee6e70ce45481812c5450586.jpg)