With contributions from Kendy

Call new help
* If LibreOffice online, call help online
* If no local help, call help online
else call offline html help
if offline help return false, call old-help

* left tempfile to be deleted when LO exits (ESC)

* hasHelp function now check if the right locale exist

Change-Id: I14893e8ba4998773706b9cf8164636475d1f2356

Fix HIDs with a ':' inside

Change-Id: I17b7c96b6b0003e8d933131b7b251f3191389a0f

Call new help directly, fix locale issue

Avoid passing by a html file that is necessary only in
the online case.

Fix path location of help/ folder

Implement fall back in languages
locale -> lang -> en-US.
If none of the theree above, call online help with locale.
fix scope

Change-Id: If92673594c92e0d5a6064bc0e0bb4b66a52730ec
Reviewed-on: https://gerrit.libreoffice.org/47748Reviewed-by: Olivier Hallot <olivier.hallot@libreoffice.org>
Tested-by: Olivier Hallot <olivier.hallot@libreoffice.org>