MDL-40275 core Improve documentation for block_base::has_config()
MDL-40314 theme_formfactor: Clean up whitespace and general tidy up of CSS
MDL-40314 theme_formfactor: fixed parse error in style/core.css
MDL-39813 dewordified the login screen
MDL-40353 fixed wrong redirection on course group page
MDL-40246 mod_forum: Changing scenario to non-JS

Also replacing hardcoded waits for a
wait to be redirected.
MDL-40337 use class loader for admin/roles/*
MDL-40337 cleanup admin select UI
MDL-40337 cleanup role allow pages
MDL-40337 cleanup role assign pages
MDL-40337 cleanup role definition code
MDL-40337 cleanup role manage UI
MDL-40337 cleanup role override code
MDL-40337 cleanup role permissions code
MDL-40337 cleanup users roles code
MDL-40337 fix remaining code checker troubles in admin/roles/*
MDL-40337 use full frankenstyle in get_string() calls
MDL-40299 textlib conversion to core_text and core_collator
MDL-40337 fix some more deprecated calls in role code
MDL-40039 webservices: Add support for alternate to contextid parameter to core_files_external::upload()