Add welcome page to help menu. Closes #802.
Add welcome page to help menu. Closes #802.

PalmBeachPost/panda,pandaproject/panda,newsapps/panda,PalmBeachPost/panda,PalmBeachPost/panda,pandaproject/panda,NUKnightLab/panda,NUKnightLab/panda,newsapps/panda,datadesk/panda,newsapps/panda,PalmBeachPost/panda,newsapps/panda,ibrahimcesar/panda,datadesk/panda,pandaproject/panda,ibrahimcesar/panda,ibrahimcesar/panda,pandaproject/panda,pandaproject/panda,datadesk/panda,datadesk/panda,ibrahimcesar/panda,NUKnightLab/panda,PalmBeachPost/panda,NUKnightLab/panda,ibrahimcesar/panda,datadesk/panda