community/kvantum: upgrade to 1.0.4
https://github.com/tsujan/Kvantum/releases/tag/V1.0.4
- Added workarounds for Qt6's window dragging, especially for its double click problem.
- Removed button contents shift (it was useless and inconsistent).
- Made menu shortcuts a little paler than menu texts.
- Added a workaround for LibreOffice's header view.
- Removed an old HDPI workaround.