* Fix performance degression around detection of tab label overflow state.
* Fix needless blank space below last tab on the "Photon" theme.
* Fix blank dialogs when the "Access your data for all websites" permission is not granted.
* Hide unexpectedly shown menu items in the context menu.
* More respect labels of menu commands in the context menu on blank area of the tab bar.
* Update `zh_CN` locale by [NightSharp](https://github.com/NightSharp). Thanks!