The current "Wired" section UI is still optimized for
the old, multi-page panel layout. Recent work [1],
however, suggest that this should change and the standard
widgets be rearranged.
This commit, then, implements this new UI for the wired
devices UI by using a listbox row when there's only one
profile (ditching out the old info labels), and moving
and deleting the bottom action buttons.
https://bugzilla.gnome.org/show_bug.cgi?id=785581
Use the 'image-button' style class to make symbolic buttons square
(as supported by latest Adwaita), and make sure to use the correct icon
size for all symbolics to avoid fuzzyness.
https://bugzilla.gnome.org/show_bug.cgi?id=693357
If you click the sections in the left side treeview, some of the
elements in the right page headers will move a couple of pixels.
Also, since the WPAD warning label was always visible, the alignment of
the controls section in the Proxy page was suboptimal.
https://bugzilla.gnome.org/show_bug.cgi?id=693357
