I am building a standalone version (QNetworkManager) without widgets/kcm for general usage withing Qt applications. uiutils.h and uiutils.cpp taint the library part with GPL (not LGPL) code. If possible re-license these 2 files as LGPL.
I think it should be possible, you will just need approval from everyone who contributed to UiUtils. Feel free to send an email to all contributors (including me) and once everyone agree, we can proceed next.
Here is some info about relicensing: https://community.kde.org/Guidelines_and_HOWTOs/Relicensing
Bulk transfer as requested in T17796