WASM: arrow keys and select-all not working for QPlainTextEdit on touchscreen

In https://ripes.me/ we use a QPlainText-edit derived editor (https://github.com/mortbopet/Ripes/blob/master/src/editor/highlightabletextedit.h#L17C41-L17C41, https://github.com/mortbopet/Ripes/blob/master/src/editor/codeeditor.h#L24). However, it seems like the following does not work in the WASM build of our app:

1. arrow key navigation within the editor
2. CTRL+A to select all text in the editor

Both of these things work as expected on desktop builds for all of our supported platforms.