add new "redo" action
added new "showDownloads" action
added new "showHistory" action
added new "showBookmarks" action
added new "undoCloseWindow" action
added new "closeWindow" action
added new "pinUnpinTab" action
added new "newBlankTab" action
changed newTab action so that it now opens the standard new tab page
changed newWindow action so that it is aligned with Firefox's open new window action
renamed "history" action to "toggleHistorySidebar"
renamed "bookmarksToolbar" to "toggleBookmarksToolbar"
renamed "bookmarks" action to "toggleBookmarksSidebar"
renamed "bookmarkPage" action to "bookmarkThisPage"
renamed "openLinkNewWindow" action to "openLinkInNewWindow"
renamed "fullscreen" action to "toggleFullscreen"
renamed "more" action to "showExtraMenu"
updated default menus based on new action names and updated the upgrade script
updated default menus based on new actions