Here's screenshots of the changes to the top panel.
- Make resources slightly closer together so that the population count doesn't overlap the civ icon in 1024 x 768 mode
- Move the follow player button slightly closer to the civ icon
- Remove the "Follow Player" text and replace it with a tooltip (the other icons have tooltips, so this seems natural)
- Make the player dropdown relative width, so that it can be wider on wider screens (names won't take up multiple lines)
- Reduce the dropdown's width in 1024 x 768 mode so it doesn't overlap with the follow player button
There is a bug where menu heights aren't always updated when the screen size changes, so you may notice that the height isn't correct when you switch from windowed mode to full-screen or vice versa. I think this affects all menus, but for fixed-width menus it doesn't matter because the new height is the same as the old height.