Increase char limit for unlink contact string.

    <!-- Menu item (in the action bar) that creates a new group [CHAR LIMIT=30] -->

    <string name="menu_new_group_action_bar">Add Group</string>

    <!-- Title of the confirmation dialog for separating contacts into multiple instances [CHAR LIMIT=26] -->

    <!-- Title of the confirmation dialog for separating contacts into multiple instances [CHAR LIMIT=40] -->

    <string name="splitConfirmation_title">Unlink contact?</string>

    <!-- Confirmation dialog for unlinking contacts into multiple instances [CHAR LIMIT=NONE] -->