package-menu-get-status instead of a regexp search.
(package-menu-get-status): Use tabulated-list-entry.
(package-menu-mark-upgrades): New command.
- (package-menu-mode-map): Bind it to U.
+ (package-menu-mode-map): Bind it to U. Add it to menu bar.
(package-menu-execute): Do installation before deletion.
(package-menu-refresh, package-menu-execute): Use derived-mode-p
instead of checking major-mode.