Bugfixes, visual changes
Coordinator.java:
-fixed bug where driver can send event without implementing EventGenerator

SimpleHttpServer.java:
-added tooltips to restart button

EmailTester.java:
-updated to implement EventGenerator

index.css:
-visual improvements, better compatability with firefox

main.js:
-fixed bug where not all widgets would be redrawn when leaving full screen
-tooltips applied to button input area if input if there is one, else tooltip will show on button hover
-implemented refreshFullScreenWidget()