QskInput::getText, QskInput::getNumber

[uwerat]

We need to have an easy way to request a textual or numerical input from the user.

The implementation needs to autodetect if the input method is using a virtual keyboard. If not a dialog - similar to QInputDialog - has to be raised, otherwise the request can be directly forwarded to the input method.

Autodetection of a virtual keyboard might be possible by checking: https://doc.qt.io/qt-5/qinputmethod.html#visible-prop