- Rewrote theme to bring it up to date with latest Zen UI.
- Improved appearance of split tabs.
- Fixed issue with placement of sound icon in Essentials tabs.
- Fixed overflow of Essential tab from tab container occurring when sound icon is present and tab is a specific width.
- Fixed issue where sound icon was not displaying correctly in pinned tabs whose webpage was changed.
- Added same icon styles to `activemedia-blocked` icon.
- Increased size and margin, and vertically centered new Zen sound playing icon in the tab.
- When in compact mode or with sidebar collapsed: Removed pointer events for sound playing button if tab is not the currently selected tab. Prevents unintentional toggling of the sound button when selecting or moving a tab with sound playing.
