DOCUMENTATION CORRECTIONS 6.29

The previous 6.28 documentation contained unsupported and incorrect claims.

Removed:
- claims that custom shortcuts can be assigned to Capella scripts;
- the claim that Ctrl+R is a Where Am I shortcut;
- claims that scripts are installed or loaded through Ctrl+F3;
- the incorrect file-loading procedure in the script list;
- the incorrect claim about a special Where Am I invocation after the
  first note;
- instructions to run the print script from Favorites or an assigned shortcut.

Added:
- copying scripts to Documents\capella\scripts\;
- the exact meaning of Ctrl+R;
- required Position display by script configuration;
- the separate Extras → Position display by script toggle;
- the correct test where Where Am I stays closed after C, D and E and opens
  only after cursor movement.
