Some color change activations require kwin_x11 --replace

[erwin]

Some color scheme options are not activated until kwin is restarted.

To Reproduce
Steps to reproduce the behavior:

1. Set Koi like this:
   
2. Toggle from Dark to Light Mode or Light to Dark mode
3. The "breeze high contrast" color scheme has a blue titlebar
4. You won't see that blue titlebar when switching via Koi, but you do see it when toggling via System Settings > Appearance > Colors:
5. If you manually restart kwin in a terminal with kwin_x11 --replace the color settings are activated.

Expected behavior
Expected Koi's Color change setting to work the same as System Preferences

Screenshots

Koi Light Mode as it works now

Koi Dark Mode as it works now

Light Mode If I also run kwin_x11 --replace

Desktop (please complete the following information):

• Distro: Kubuntu 21.04 x86_64
• Plasma 5.21.4
• X11 not Wayland

Additional context
Add any other context about the problem here.

• My suggestion is to add a "restart kwin" checkbox to the Koi Preferences, so that people can optionally do this if needed...
• Or to add a "Light Command" and "Dark Command" so that we can use Koi to trigger this change, and also to cascade that out to other programs that we want to reconfigure.

[baduhai]

I believe this is no longer required, reopen if I'm incorrect, I don't use x any more.