[css2] Added missing lower-alpha and upper-alpha to properties db

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extra : convert_revision : svn%3A73dc7c4b-06e6-40f3-b4f7-9ed1dbc14bfc/trunk%402315

Author: bert-github

css2/properties/properties.db

@@ -603,6 +603,7 @@ table-cell | table-caption | none | inherit;;
   disc | circle | square | decimal | decimal-leading-zero | 
  lower-roman | upper-roman | lower-greek |
  lower-latin | upper-latin | armenian | georgian |
+ lower-alpha | upper-alpha |
  none | inherit;;
   disc;;
   elements with 'display: list-item';;