Fix misuse of @submission in regradeAll and regradeBatch

* Update PDF annotation buttons so that the text is visible as well as the icon. Fixes #814.

* Remove unnecessary comment.

* Added search table

* Fixed student search bar

* fixed problems page redirect

* set up tab redirects by including a tag with each submit button

* Fixed basic bug and commented code

* removed vscode

Namely address launch.json but also removes any additional vscode IDE-specific configurations

* Fix Manage Submissions Page functionality (#805)

* use $? instead of $CHILD_STATUS in Moss (#804)

* Changed the database from mysql to sqlitefor development purposes (#719)

* Added materialize gem and phased out bootstrap (#720)

* Integrated new navbar (#721)

* Change lab template image to autograding_image for use with Tango Docker

* Bump ruby version for rspec testing framework

* Add mysql gem to Autolab2.0

* Navbar icons (#725)

* navbar_icons

* button fixes

* Change lab template image to autograding_image for use with Tango Docker

* Bump ruby version for rspec testing framework

* Add mysql gem to Autolab2.0

* navbar_icons

* button fixes

* Material Course List and Assessment List (#731)

* Update courses index page

* Update Assessments index page

* update course list display logic

* Add materialize style to course and assessment card pages

* Assessment page redesign (#741)

* Convert assessment page cols from bootstrap to materialize

* Convert initial collections and cards

* Add styles and html for Danger Zo...