Possibility to project Home

[IeP4nieF]

Description:
Right now there is no way to project the "Home". It would be a good to project "Home" while the participants are arriving instead of an empty projector.

Expected behaviour:
There should be a project button for home.
This button should be right next to the edit button and pressing this button should open the "
Project selection?:" dialog where you can select the projector to project the content

[Elblinator]

This is a nice to have feature and we are planning to make home projectable.
The button to project home however will be placed directly at the home screen

(The implementation will be done in the client and the issue will be moved there, the description will be adjusted and furthermore the priority will be changed to low

[Elblinator]

This will however wait for the new projection service