Looks like some war table operations are unavailable in 5:4 aspect ratio, and Bioware didn't release any solution yet. For an "easy solution" you have to click alt+enter, adjust the window size in a way your hud ins't deformed (only for the first time). Then you can use the war table normaly and return the fullscreen after that. The thing is, you have to alternate the mode of exibition always when you have to see all the war table. Still annoyng, but at least you don't have to change anything in the game options, just alt+enter when you are at the war table and alt+enter again when you are in the regular map area. Quick and easy.