I asked the same thing in April this year

http://lists.squeakfoundation.org/pipermail/squeak-dev/2010-April/148870.html

All what you need to know is there (20 messages).

We just need to decide and implement it.

--Hannes

On 11/6/10, K. K. Subramaniam <kksubbu.ml at gmail.com> wrote:
> On Saturday 06 Nov 2010 5:44:37 pm Janko Mivšek wrote:
>> On my Linux the right click shows halos instead of menu. I know that
>> there is some settings somewhere, but this should be done automatically
>> instead. This is otherwise already solved on Pharo.
> swapMouseButtons preference. Morphic environments need halo so they ship
> with
> this turned off. Pharo is a development image so it can turn this off to get
> ContextMenu on right click.
>
> Subbu
>
>