[ubuntu-mono] [Bug 1707398] [NEW] sysinfo crashes on startup

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System: ASUS k50ij notebook, Intel T4300 dualcore cpu, 4gb ram, Intel GMA450m Graphics, 250Mb HDD
OS: Linux Mint 18.2 XFCE

ISSUE:
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When opening the application 'Sysinfo' the app will crash, when clicking on the "System" Tab.
When selecting the "System" tab as default tab on startup in settings, the application will crash on startup.

OUTPUT:
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mike at mike-laptop ~ $ sysinfo

Exception in Gtk# callback delegate
  Note: Applications can use GLib.ExceptionManager.UnhandledException to handle the exception.
System.NullReferenceException: Object reference not set to an instance of an object
  at Sysinfo.SystemInfo.Gnome () <0x40590f80 + 0x000a0> in <filename unknown>:0
  at Sysinfo.Sysinfo.on_notebook1_switch_page (System.Object o, Gtk.SwitchPageArgs e) <0x4057c830 + 0x0011b> in <filename unknown>:0
  at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) <0x4057c000 + 0x002cf> in <filename unknown>:0
  at GLib.ExceptionManager.RaiseUnhandledException (System.Exception e, Boolean is_terminal) [0x00000] in <filename unknown>:0
  at Gtk.Notebook.SwitchPageSignalCallback (IntPtr arg0, IntPtr arg1, UInt32 arg2, IntPtr gch) [0x00000] in <filename unknown>:0
  at Gtk.Notebook.gtk_notebook_set_current_page (IntPtr , Int32 ) [0x00000] in <filename unknown>:0
  at Gtk.Notebook.set_CurrentPage (Int32 value) [0x00000] in <filename unknown>:0
  at Sysinfo.Sysinfo..ctor (System.String[] args) [0x00000] in <filename unknown>:0
  at Sysinfo.Sysinfo.Main (System.String[] args) [0x00000] in <filename unknown>:0

** Affects: sysinfo (Ubuntu)
     Importance: Undecided
         Status: New

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sysinfo crashes on startup
https://bugs.launchpad.net/bugs/1707398
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