Great aesthetic changes and small bugfixes

Summary:
Fix animating position when bus is removed

Also close the window when a bus is removed

Adjust colors and styles and fonts

Adjust layouts and behaviors

Hide button when there is no info

Reviewers: valerio.bozzolan

Reviewed By: valerio.bozzolan

Subscribers: valerio.bozzolan, Libre BusTO

Tags: Libre BusTO

Differential Revision: https://gitpull.it/D197