(feat): Add "instant search"

[failuregrinder]

Is your feature request related to a problem? Please describe

Not exactly a "problem", but a quality-of-life improvement. Currently, finding a specific setting requires an extra, unnecessary step.

Describe the behaviour you'd like

Adding an search-on-open feature to the menu would be a great convenience improvement. It works really well in the Essential mods: you open the menu and can type to search right away, without having to click the search bar first.

Suggestion: Making this a toggleable setting would be perfect, so users who prefer the current flow aren't forced to change (though honestly, once you‘ve experienced the speed of just typing, it‘s hard to imagine going back to the extra click).

Describe alternatives you've considered

Additional context