Log Message:
Update orca to 2.26.0.

    * Many bug fixes and performance improvements across the board (over 160
      bugs)
    * A couple very serious hangs were eliminated.
    * Speech pitch, rate, and volume now change on the fly when adjusting
      them in the preferences UI.
    * Vastly improved support for ARIA in Firefox.
    * Improved performance and reliability for flat review.
    * New feature to speak MultiCaseStrings as individual words.
    * New feature to automatically speak shortcuts (mnemonics).
    * Known Problems:
          o See the open bugs in the Orca bug database. We not only track
            Orca bugs in the Orca bug database, we also track bugs in other
            components that affect Orca's ability to provide good access to
            them.
          o Compiz is still not fully accessibility friendly at this point
            in time. We recommend you stick with Metacity until the Compiz
            kinks are worked out. If you're using Compiz and want to switch
            to Metacity, you can run the following command:
            metacity --replace.