Increase char limits on some strings

    <string name="joinConfirmation_positive_button">Save and Link</string>

    <!-- The text to show on on a ProgressDialog indicating we're currently linking

         contacts [CHAR LIMIT=20]-->

         contacts [CHAR LIMIT=30]-->

    <string name="contacts_linking_progress_bar">Linking</string>

    <!-- The text to show on on a ProgressDialog indicating we're currently unlinking

     contacts [CHAR LIMIT=20]-->

     contacts [CHAR LIMIT=30]-->

    <string name="contacts_unlinking_progress_bar">Unlinking</string>

    <!-- Menu item that links an aggregate with another aggregate -->