Summary:
* Add missing include for used class
* Remove unnecessary dependency on libkf5networkmanagerqt-dev
Test Plan:
1. Check that the build does not fail.
2. Check that it has the same behaviour as before.
Reviewers: wxl, tsimonq2, hmollercl
Differential Revision: https://phab.lubuntu.me/D48
Summary: Get new release 0.4.3
Test Plan: after packagin see if version is 0.4.3, icons should be well seen in taskbar
Reviewers: wxl, tsimonq2
Reviewed By: tsimonq2
Differential Revision: https://phab.lubuntu.me/D26
