Post-Berlin DLC Update

The update fixes a couple of issues (see below) and adds some gentle balancing updates to the Victory in the East (Berlin) and Balaton 45 campaigns.

• ger_mot_dlc9 sheet render fix
• enlarged playable in balaton scenario
• river fix (NW of Slonim)
• sov_spec_dlc9_opt "made a little juicier"
• removed amphibious flag from sov_spec_dlc9_opt
• bridge fix (Dresden)
• enlarged playable area in Balaton scenario
• ger_mot_dlc9 sheet render fix
• ss_inf_dlc9 sheet render fix
• fix exploit in Ploesti scenario