Manuals: Selecting item in search view occasionally selects first item in browse view

[AkshayWarrier]

I haven't found a clear-cut way to reproduce it but sometimes, when you search for something in the search view and select it for the first time, it will initially select the correct item in the browse view (and hence correctly load it in the webview as well) but going back will select the first item in the browse view ("Adw-1").

bug.mp4

I have a feeling this is a bug with GTK because there's possibly nothing that should cause it to do that only the first time around, but it requires further testing.