[FEAT] Settings modal with corrected multiple themes

[matijakljajic]

Settings modal, where you can change your preferred theme and other things regarding searching.

[aleksasiriski]

In that model you should be able to pick from "session" storage vs. "local" storage, meaning that you choose if you want the theme to be only within that session or stored permanently. If the latter, you agree to "cookies" (which is only the theme preference stored in localstorage, nothing more).

[matijakljajic]

In that model you should be able to pick from "session" storage vs. "local" storage, meaning that you choose if you want the theme to be only within that session or stored permanently. If the latter, you agree to "cookies" (which is only the theme preference stored in localstorage, nothing more).

To be more specific, it's good enough for it to be a sole checkbox which will enable localStorage that will in turn override sessionStorage if enabled. When enabled, a warning-like hint can appear below it which will say "You're agreeing for this setting to be persistent" or something like that. I believe that's good enough for it to be GDPR compliant.