Do not focus the searchfield on startup if a virtual keyboard is enabled
If a virtual keyboard (like Maliit) is enabled, we end up always showing the virtual keyboard on startup, while there are many cases where a user would not use the search. So make use of new API added to Kirigami to detect if a virtual keyboard is enabled and only focus the search field if there is no virtual keyboard enabled.
Depends on frameworks/kirigami!398 (merged)