Fixing nm-applet (Network Manager Applet) icon in LXDE/XFCE/MATE Desktop

If we use MATE or LXDE, we probably often got a bug in Network Manager Applet (nm-applet) particularly if we use a mobile broadband connection. The bug is there is no icon when the connection is established. What does really cause this ? Well, apparently, the cause is very small, actually not a big deal. The cause is in the crappy default gnome icon theme (yeah, tango icon theme and the gnome icon theme is the ugliest icon themes ever).

To fix this, just follow these simple steps :

1. Choose a good icon theme for 24 pix panel size
   (I took an icon from /usr/share/icons/Faenza/status/24/nm-signal-100.png
2. Rename the icon to be nm-wwan-tower.png
3. Move the icon into the system
   sudo mv nm-wwan-tower.png /usr/share/icons/hicolor/22x22/apps
4. Logout login, or reboot the system, and last, try it by connecting to the Internet.