Log Message:
7kaa: Update to 2.15.4

Summary of changes from 2.15.3 to 2.15.4

     * Fixed a problem in multiplayer that halted the game play.
     * Added option to play with the original seven kingdoms, and enabled on
       original scenarios.
     * Apply the leadership bonus when the general is in fort for defending
       soldiers in range.
     * Fixed the mobile general range calculation for the leadership bonus to
       not apply to the troop anywhere on the map.
     * Apply the leadership bonus when the general is on a ship for defending
       soldiers in range.
     * Updated translations.
     * Added hotkeys for managing the build menu in the War Factory, Harbor,
       and Town.
     * Restored support for real full screen resolution that requires a
       screen mode change.
     * Improved dynamic UI button and text layout.
     * Added Polish translation.
     * Added trade locations to the trade report.
     * Sort and filter trade locations based on the map selected caravan.
     * Allow setting stops using the trade report.
     * Allow copying trade routes using the trade report.