Missing programs in the listing

[HKaufmann2]

• [x ] I have read the README.md document
• [x ] I am using the latest version of Warehouse
• [x ] I am using the Flatpak package of Warehouse
• [x ] I have not found any other opened issues on the same topic

Describe the issue in detail

The program does not find all Flatpaks. For me, for example, Pika.
The Pika program is located in the directory .var/app/.

If applicable, provide steps to reproduce the issue

Run flatpak run io.github.flattool.Warehouse in a terminal and if applicable, show any output

(warehouse:2): IBUS-WARNING **: 10:48:13.105: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«

(warehouse:2): IBUS-WARNING **: 10:48:13.191: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«

(warehouse:2): IBUS-WARNING **: 10:48:13.195: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«

(warehouse:2): IBUS-WARNING **: 10:48:13.429: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«

(warehouse:2): IBUS-WARNING **: 10:48:13.511: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«

(warehouse:2): IBUS-WARNING **: 10:48:13.518: ibus_input_context_post_process_key_event: GDBus.Error:org.freedesktop.DBus.Error.InvalidArgs: Keine derartige Eigenschaft »PostProcessKeyEvent«