Optimize data table for limited horizontal space

[poser]

By...

• Setting default window width big enough to show full column headers for all columns
• Providing a "customize columns" dialog with hide/display checkbox for each column.
• Set default "device details" window width to appropriate value
• Shrinking column width where max width is known, eg:
  • 15 characters for IP Address
  • 17 characters for MAC address
  • The padlock column is about twice as wide as it needs to be
• Reducing columns arbitrarily:
  • Nickname could be shorter
  • Hostname could probably be shorter
• Shorter column headers
  • Last WiFi Network -> Last Network
  • Previous WiFi Networks -> Previous Networks

[poser]

See also, #83

[poser]

Even high quality projectors frequently support fewer than 1600 horizontal pixels...