Debugger: Simplify debuggertooltipmanager.h

Change-Id: Iaa4204d374913c65e322b2a00831caeb1b3b1ccc
Reviewed-by: hjk <hjk121@nokiamail.com>
Debugger: Rename hide to hideAllToolTips in tooltipmanager.cpp

Easier to guess what gets hidden.

Change-Id: Ie7731dc6bb601bfa1ea6eb8cb69822e72bdfbd66
Reviewed-by: hjk <hjk121@nokiamail.com>