Inconsistent behaviour on NFS automounts  #3242

 * Nemo version (nemo --version) nemo 5.6.4
 * Is issue with desktop or windowed nemo?  windowed
 * Distribution - (Mint 17.2, Arch, Fedora 25, etc...)  Mint 21.1
 * Graphics hardware *and* driver used 
 * 32 or 64 bit  64

Issue
I have some mounts targeting automounted NFS shares. When I click on them, share is duplicated as network device.
Contents panel is reset 30 seconds after doing nothing in the window.

Steps to reproduce

• sudo systemctl enable autofs
• echo "/media/test -fstype=nfs,rw host.local:/public" | sudo tee -a /etc/auto.master.d/host.nfs
• sudo systemctl restart autofs

Current behaviour

Current behaviour in Places

• Launch a nemo window, with Places displayed

  • Click on the test mounted device (icon with eject sign)

  • A new test network device is created (icon with waves sign), pointing to the same path. Focus is put there to browse the share.

  • Contents panel is reset 30 seconds after doing nothing in the window., Home is displayed again.

Current behaviour in Treeview

• Launch a nemo window, with Treeview displayed

  • Click on the test mounted device (icon with eject sign)

  • A new test network device is created (icon with waves sign), pointing to the same path. Focus stays on the mounted device

  • Contents panel is reset 30 seconds after doing nothing in the window, Home is displayed again. Network device is still visible, while mounted device is removed

Expected behaviour

I stay in the test item shown as mounted device and can browse the contents.
No other devices are created.
Current device is not remove from Treeview.

Other information