wi-fi: Have page contents clamped like other pages
Achieved by making the container widget for all other widgets (that are in the content section of the panel) an AdwPreferencesPage and having each group of widgets (for example, the airplane mode toggle) be in its own AdwPreferencesGroup.
Much along the lines of !1739 (merged) and !1740 (merged).
Appears to solve #2420 (closed).
Edited by Emad Saadat