Tab key not working.

· Description

Pressing the Tab key inputs a character instead of autocompleting the input.

· Steps to reproduce

1. Create or load a world.

2. Connect an external keyboard to an Android device.

3. Open the chat bar.

4. Type /func

5. Press the TAB key on the external keyboard.

· Observed result

A character is input after /func.

· Expected result

/func is completed to /function.