Move the find in selection button into a filters dropdown

[Tyriar]

Current:

Proposed:

When a filter is non-default:

Find in selection behaves a little strangely currently as it's enabled when there is no selection, we could disable the dropdown entry in this case.

We can also expand this filter to include find in commands/strings/brackets in the future so it's not just a single entry. @hediet is there a feature request for this you could link?

[hediet]

No known feature request for this.

[miguelsolorio]

I believe we had previously discussed this in #14836 (comment)

[amunger]

duplicate of #144851