First of all: thanks for the great work from a long time (~15 years) KDE user.

I've recently upgraded to Kubuntu 18.04 which I think ("About KDE" doesn't tell) includes KDE Plasma 5.12.
Since them I'm missing something in the Networks widget: the "Details" tab for WiFi connections nomore tells me which WiFi standard the connection uses (e.g. g, a, ac) and - which I miss even more - if I'm connected with 2.4 GHz or 5 GHz.
That's information I frequently miss and which - if I remember correctly - was included before.
Is there a way to have that information shown, e.g. by editing a local config file?