[CRT]
- Use PeekConsoleInput in kbhit because the input buffer should not be affected. Patch by Roy Tam
CORE-8030 #resolve

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@62587 97493ccd-5924-5043-b1f5-66cb403b36ce
[NTOS:KE]
- Verify valid IRQL in KeDelayExecutionThread, just like in KeWait*
- Return from KeDelayExecutionThread after yielding execution

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@62590 97493ccd-5924-5043-b1f5-66cb403b36ce