Add module for displaying moodleform in a modal window

Test 1 modal forms As admin go to Site administration>Courses>Course custom fields Create a category Add new fields, edit fields, make sure the form is displayed in the modal dialogue and works properly. Test 2 ajax (embedded) forms and repeat element Install a plugin from https://github.com/marinaglancy/moodle-local_modalformexamples Open page /local/modalformexamples/ , it has links to four different examples Make sure the repeated elements work in all four forms, both client- and server-side validation work, etc. Test 3 AJAX/modal forms As admin set $CFG->userquota to something low Login as a regular user (not admin) Go to your private files by clicking the "Private files" link in the side panel (it will take you to /user/files.php) Add some files to your private files area, save changes Make sure the page is not reloaded, only the filemanager is reloaded Upload file above the limit Save the changes and make sure an error is displayed in a form With unsaved changes try to navigate away (click on a "Dashboard" link, for example) Make sure a warning is displayed Save changes and navigate away Make sure there is no warning (unfortunately at the moment there can be an extra warning here, see below) Go to your dashboard and locate the "Private files" block Click on the "Manage private files..." link Make sure you can interact with a private files popup the same way you could on the Private files page General note: there may be some situations when the warning about unsaved changes appears when it should not appear. This should be fixed in MDL-69918