[Suggestion] Another "level" to draw sea borders

Hi all,

Can the AtWar be an another "level" to draw the sea into the countries? I think this is not so difficult to implement. Can help and improve a lot the game.

Thanks!

If another level of sea could exist, i could draw the entire rivers inside the countries to make the naval units in the harbors inside the country border. Do you understand? Its simple.

Borders = Countries
No borders = Sea
Another level for the sea and rivers inside that permits to draw rivers inside the countries = Sea

Thanks.