bug(query_default_app): doesn't read desktop files

[elde-n]

Using

xdg_utils::query_default_app("x-scheme-handler/https").unwrap();

fails with error: Custom { kind: NotFound, error: "No results for mime query: x-scheme-handler/https" }

but using the shell command

xdg-mime query default "x-scheme-handler/https"

gives me: io.gitlab.librewolf-community.desktop

Noticing that I had $XDG_DATA_HOME/flatpak/exports/share in my $XDG_DATA_DIRS environment. I looked inside and found that $XDG_DATA_HOME/flatpak/exports/share/applications had symlinks to .desktop files that contained the MimeType entries.

Reading the desktop file in $XDG_DATA_HOME/flatpak/app/io.gitlab.librewolf-community/current/active/export/share/applications/io.gitlab.librewolf-community.desktop contained

MimeType=text/html;text/xml;application/xhtml+xml;x-scheme-handler/http;x-scheme-handler/https;application/x-xpinstall;application/pdf;application/json;

Reading the source code of query_default_app I can see that, no desktop files or symlinks are being read.