Inactive icons in dark view not visible well

[jarogumulec]

When dark mode is selected, the icons in quick view , and in Analysis (card icons as well as Lduplicate" and "remove" not visible well, as they were designed for classical view.

[paulmueller]

The general solution should be to have two (optionally dynamically generated) set of icons that are set during initialization. Identifying the current dark/light mode should be done reliably.

I don't know how to dynamically change the icon theme whenever the OS changes it, so a restart of DCscope will probably be required.