See what modules are installed, enabled, or have files missing

Attached is a module that works with multisite maintenance to show for each module in the installation which sites are using it and other info. The list can be positively or negatively filtered by keywords, core modules, enabled, installed and files available. The list can either show which sites are installed/enabled for each module, or just how many sites are installed and how many enabled for each module. The list can be sorted by module name, path, or package name. The list is colour coded according to the various module status (enabled, installed, files available), if the site list view is enabled then each site is colour coded.