func: Add global help screen
func: Add global help screen

Change-Id: I7bbf795300f9dc1f1765047377e4a6fb3141e3ff
Signed-off-by: Karol Lewandowski <8fb8916c55d06d2ab80c72f8c4561ece4e86f62e@samsung.com>

kopasiak/gt,kopasiak/gt