Created attachment 111799 [details]
Screenshot of connection edit window, with scroll bars.

Steps to reproduce:

1. Click system tray and open network applet.
2. Click the "edit connection" icon in top right corner.
3. Check the window size.

Actual result:

Both width and height of the window is not big enough. Here are both vertical and horizontal scroll bars.

Expected result:

Width and height of the window should be big enough to display all content without scroll bars, except connection list (if you have many connections saved).