Update package kvantum from 1.0.5 to 1.0.7 (jsc#PED-2635)

- Use qt6_build macros to fix build in SLE15 SP5

- Fix a typo in kvantum-themes dep-requirement
* Change kvanum-qt5 to kvantum-qt5

- Version 1.0.7
* Don't rely on the (undocumented) "Destroy" event to remove
destroyed widgets from lists. In this way, the cause of a rare
crash is removed.
* Better guarantee for the lack of scrollbars in the config page
of Kvantum Manager when it's visited for the first time.

- another fixes in naming

- Proper naming

- Update Summary

- fix build Qt6 version for 15.4

- simplify conditions

- use singlespec muiltibuild

- attempt to multibuild

- Version 1.0.6
* Added workarounds for Kate's new side-pane and status-bar buttons
(which still have wrong style codes).
* Silenced the compilation warnings with Qt 6.4.