Fix trashcan bin "not supported" error message

[skarbat]

This PR fixes the problem whereby when you go into the Home Folder and select to view the trashcan, you would get an "operation no supported" error message.

Adding the gvfs package seems to resolve the problem. Tested on the PI on most recent image.

[skarbat]

[P3] Trash Can broken

[Ealdwulf]

Nice one - Been wondering forever why that didn't work.
However it seems a bit late this release to add a package. I think gvfs is also involved in other stuff (eg, usb disks, which we handle separately) so we might want to avoid merging this until after this release.

[skarbat]

Thanks Alex @Ealdwulf , very much appreciate your detail to wisdom thoughts, one thing is for certain is that it brings up a gvfsd daemon up and running, for the records.

[tombettany]

Looks like we are all agreed on this. @skarbat I'll switch this over to be a PR to master.

[skarbat]

Agreed, thanks @tombettany