Can't draw on screen when in REPL mode
When in REPL mode (st3m_mode_kind_repl), it's not possible to draw anything on screen with ctx (because st3m_mode_update_display is drawing over it?).
Steps to reproduce:
- Boot into main
- Open USB console
- Send CTRL-C
- Run code that tries to draw on screen (e.g. through mpremote mount)
Expected behaviour:
- Code should draw on screen
Actual behaviour:
- In REPL, Send CTRL-D.. stays on screen