Preview windows is closed with Escape key

[vbrdev]

When editing the contents (e.g. with vim) and one hits the escape key on the keyboard more than he should, then the preview window is (accidentally) closed.

[kreuzberger]

Due to the qtcreator documentation from here:
https://doc.qt.io/qtcreator/creator-keyboard-shortcuts.html

The ESC is handled by the TextEditor (not only RST, also others) in this way:

Move to Edit mode. In Edit mode:
The first press moves focus to the editor.
The second press closes secondary windows

If you do not want to have this behaviour, disable the global shortcut for this