Remove the inline javascript from discopower-module

We'd like to stick with echo throughout the project

Fix logic error in UIInfo generation

* Fix discopower tabs

* Remove duplication of search prototype

Discopower fixes

Also move the templates to the "saml" module, since they belong in there.

The old mail class uses the built-in `mail` function in PHP, and builds a payload by itself using hard-coded HTML and MIME-snippets. Let's use a library for that; PHPMailer has new dependencies and does all the heavy lifting.

metadata: Make the documentid a hash over the document contents, so it does not change on every page load

Fix Psalm issues lib/

Also reorder alphabetically

Add an extra build step to specify the current version (the one we are building) in the composer.json file.

Fix Psalm issues modules/