A lot of keys (especially keys not available on US keyboards) just weren't
supported for console input with SDL1.2 (SDL2 uses a different mechanism for
that).
This is fixed now by reordering a few lines in sdl_events.cpp
Please note that still only ASCII characters are supported and those keys
still can not be used in bindings - only for text input!
If the window loses focus com_pause is set to 1, when it regains focus
it's set to 0.
The behaviour on Win32 stayed the same (the implementation is less
hacky though) and Linux now matchces that.
* add define for SDL_SCANCODE_GRAVE - seems like only SDL2
has names for the values
* add some missing keys to SDL_KeyToDoom3Key
* add scancode to unmapped-key warning
* backspace needs to be handled the same for SDL1 as in SDL2
(i.e. a new event must be created for it) to work in console
* Add support for Console-Key independently of KB Layout (with scancode)
* add support for TAB key
* Add hack so console is empty after opening it (SDL-only)
it didn't work correctly because the mouse isn't grabbed
(in contrast to dhewm3).
It's fixed now by returning absolute coordinates when a menu
is open, furthermore the cursor is now always hidden.
