Make tutorials and help text regarding zooming use actual keybindings

[hhyyrylainen]

now it just says to use the scroll wheel, instead should show the actual bindings

It's in MICROBE_STAGE_HELP_MESSAGE_1

Requires: https://github.com/Revolutionary-Games/Thrive/issues/2851 Requires: https://github.com/Revolutionary-Games/Thrive/issues/2850

as well as the last microbe stage tutorial popup, which requires one more other issue to solve: https://github.com/Revolutionary-Games/Thrive/issues/2462

[hhyyrylainen]

Here's the bbcode to show the zooming out [thrive:input]g_zoom_out[/thrive:input] (zooming in should be easy enough to find or figure out based on that).

[hhyyrylainen]

This should no longer be impeded.