[nvda] Correction about NVDA and mouse keys for XP

This is just to correct an earlier post of mine saying that mouse keys does not 
work with NVDA.  Silly me forgot to check the checkbox to enable it.  But to 
clarify, mouse keys does work with NVDA once you enable it in the accessibility 
options correctly and turn on num lock.    Then you press and hold the left alt 
and shift keys and move the mouse pointer with keys 2, 4, 6, and 8.

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