Kingdom Overview screen, Heroes Overview and Towns/Castles Overview screens, change the frame color and adjust the position of the buttons

Edit 2020/10/02.

I edited the changes to be made. For the scroll bar and scroll bar buttons, I was fooled by the difference between fullscreen mode and windowed mode both in the original game and fheroes2.

In fheroes2, there is a one pixel wide gray colored border all around the screen. It is this border that should be changed to black color, and everything will be fine.

In fheroes2:

I suggest a small modification for a better visual appearance for the "HEROES", "TOWN/CASTLES" and "EXIT" buttons in order to leave a space of 1 pixel to the top and the right of the buttons.

• reduce the dimension of the frame of mines and others by 1 pixel on the right.
• replace the yellow pixels at the bottom of the screen where the large vertical bar to the left of the "HEROES", "TOWN/CASTLES" and "EXIT" block joins the yellow frame of the screen.
• move the "HEROES", "TOWN/CASTLES" and "EXIT" button block by 1 pixel to the left.
• move the "HEROES" and "TOWN/CASTLES" button block by 1 pixel to the bottom.