Textbox: only editable on first iteration of loop

[RebeccaHirst]

Minimal demo here: https://pavlovia.org/Consultancy/textbox_editable_bug Issue first described here: https://discourse.psychopy.org/t/editable-textbox-only-accepts-input-on-first-trial/24358

[RebeccaHirst]

The fact that the user has reported that the textbox is editable when the esc key is pressed is useful and indicates that this is linked to the issue of when the window is resized.

[RebeccaHirst]

temporary fix is to call textbox.refresh() at the begining of the routine https://discourse.psychopy.org/t/editable-textbox-only-accepts-input-on-first-trial/24358/3?u=becca