GHOST_ISystem::toggleConsole had a somewhat misleading name
it could be fed 4 different values, so it was not as much a
toggle as a set console window state.
This change renames `toggleConsole` to a more appropriately
named `setConsoleWindowState` and replaces the integer it had
to an enum so it's easy to tell what is being asked of it at
the call site.
Reviewed By: LazyDodo
Differential Revision: https://developer.blender.org/D14020
f021d46752