Expansion wide preset search

[David Healey]

I've (Claude) added searching across expansions to the preset browser. If no expansion is selected then it will search all expansions. If an expansion is selected then it will only search within that expansion, if you change the selection it will move the search to the newly selected expansion. PR.

I also added a FullPathSearch data property, similar to the FullPathFavorites one I added a few months ago so you can see exactly which expansion/bank/category a preset belongs to in the search results. Very useful if you have multiple presets with the same name.

I'll also implement a similar thing to make favourites work across expansions.

[David Healey]

I've added the expansion favourites handling now. There were a few weird glitchy things with the preset browser that I also fixed, such as the expansion column width changing when the results column is displayed, select a column text appearing behind the favourites results, and the search box focus causing the favourites results to be displayed even when the show favourites button was deactivated.