Changed context menu DesktopWindows a bit

This is necessary because if a mod ( in test case - PAC3 ) adds a custom
button under "Player Model", it will block the top of context menu from
being clickable  when holding C button.
Added right click menu for spawn menu headers

So you are able to delete them.
Revert "Changed context menu DesktopWindows a bit"

This reverts commit d7753fd5e036f05e20080ce483ba45cd800820fa.
Merge pull request #38 from robotboy655/master

Added right click menu for spawn menu headers