Issue #2451665 by dawehner: Don't rebuild the route on ModuleInstaller::install() (30% installer speedup)

Issue #356399 by dawehner, beejeebus, catch, sidharrell, klausi, nlisgo, Josh Waihi, Berdir, martin107: Optimize the route rebuilding process to rebuild on write

Issue #2338873 by plach, fago, effulgentsia, swentel: Modules providing non-configurable field storage definitions can be uninstalled, leaving orphaned unpurged data