StrongED: release version 4.66f2 (2nd full release)

This is release version 4.66 of StrongED, the RISC OS text editor.

Changes from version 4.66f1
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Bugs fixed:
  Display->ShowTab icons were not ticked properly
  Tab was displayed as control code if QuoteChar was set and previous line ended with '\\'
  Adjust click on spell icon caused an abort if SpellMod could not be loaded 
  Spell cursor was orange instead of black in 16 colour modes
  Sort function could go wrong if 'Automatic indent after return' was on
  Trying to sort a block with partially selected lines in it should raise an error but didn't
  Sorting a block consisting of a one line produced a 'bad flexblock' error 

Improvements:
  26/32-bit neutral SpellMod included



