Decided to keep the current Windows API padding rules. We can change it later if needed.

container_windows.c

@@ -58,7 +58,6 @@ BOOL sharedWndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT *
 // from https://msdn.microsoft.com/en-us/library/windows/desktop/dn742486.aspx#sizingandspacing and https://msdn.microsoft.com/en-us/library/windows/desktop/bb226818%28v=vs.85%29.aspx
 // this X value is really only for buttons but I don't see a better one :/
 #define winXPadding 4
-// 3 might look better but IDK... TODO
 #define winYPadding 4
 
 void resize(uiControl *control, HWND parent, RECT r, RECT margin)