This factorizes the row creation a bit and normalizes the margins and
spacing, reducing the required width. This also makes labels like row
titles and descriptions ellipsizable so the rows can reach narrower
widths.
The "Bluetooth" section is actually a catchall section for all
device types we don't know much specifically (Includes, but not
limited to Bluetooth).
Rename/relabel it to something more comprehensive.
Closes https://gitlab.gnome.org/GNOME/gnome-control-center/issues/488
This commit renames {network|wifi}.ui to cc-{network|wifi}-pane.ui,
in order to match the corresponding C files. This introduces no
functional changes.