new icons for disconnected/disabled devices

Summary:
there were some icons which conveyed meaning solely by color
which is discouraged by the hig
https://community.kde.org/KDE_Visual_Design_Group/HIG/Color
this makes use of the little x corner icons that are already
used somewhere in breeze (like muted microphone)
the exception is wireless off that has a bar, so a stronger
this is disabled message than wireless-disconnected

Depends on D10243
...which should go in asap

Test Plan: they all look readable at 100% zoom

Reviewers: Plasma, VDG, andreask

Reviewed By: andreask

Subscribers: andreask, Frameworks

Tags: Frameworks

Differential Revision: https://phabricator.kde.org/D11390