Add Setup Wizard support for devices with no wireless cards

[critzo]

Currently the Commotion Setup Wizard assumes that the device you're installing to has at least one wireless card. However, there are devices such as the Mikrotik RB450G which could function well as mesh-over-ethernet devices, paired with other wireless routers. Commotion Router can be installed on these devices, but the Commotion Setup Wizard presents luci/lua errors when loading pages that look for wireless devices.

Enhance the Commotion Setup Wizard by adding checks on appropriate pages that include the use case of a device with no wireless cards.This will allow for full completion of the Setup Wizard on such devices. This feature request could be paired with an enhanced version that allows a user to choose ethernet interfaces to use for meshing as well.

The relevant files to check are:

• basic_mn.lua
• basic_wn.lua
• client_wp.lua
• security_pass.lua
  security_smk.lua