[Bf-committers] Change some event type values

[Bastien Montagne]

Hi devs,

In rB1979ae3a420b I fixed ISKEYBOARD() macro to not consider 
INPUTCHANGE, WINDEACTIVATE and TIMER events as keyboard ones!

However, core of the issue is that those events are in the 'low' area 
(0x01xx) of event types, imho it would make much more sense to move them 
to the 'high', internal area (0x5xxx), like all others.

Would rather first get confirmation that this won't break anything, 
though (would not expect any issue, but better safe than sorry here).

Cheers,
Bastien