add 404 header if resource not found (closes #3541)
add log msg if resource not found (closes #3619)
Merge pull request #659 from Eric-Brison/3.2-A3619

3.2 a3619
Clean generic_root php file (refs #3610)
Clean generic_root xml file (refs #3610)
Reindent GENERIC.app (refs #3610)
Beautify and indent generic_list (refs #3610)
Beautify generic_tab (refs #3610)
Beautify generic_barmenu (refs #3610)
Beautify and indent barmenu (refs #3610)
Add js to open overlay (refs #3610)
php beautification (refs #3610)

generic_list
generic_search
family_barmenu
Suppress useless menu in onefam context (closes #3610)