Cannot uninstall modules
In v3.4 and trunk modules can not be uninstalled.(v3.2 and previous not affected).
When the wizard "Perform pending installation/upgrade" is executed, the modules marked to be removed are not uninstalled because they state is changed to "Installed".
It seems the load_module_graph() method not takes into account the "to remove" state of the modules and change it to installed state.