Edit book: When renaming classes in style sheets only recognize class names preceded by a period.Add an option to the preferences drop down menu to restart calibre without third party plugins.holding down the Ctrl+Shift modifier keys now add the tag to the current search with 'AND' instead of 'OR' when using only Ctrl Book details panel: While clicking tags/authors/etc.E-book viewer: Allow pressing the 0-9 keys to apply a quick highlight style.Edit metadata dialog: Customize cover generation: Allow saving and loading cover generation settings as 'themes'.