Packaging: add host.html.tmpl to ui/pages/tabs/Makefile.am

The file ui/pages/tabs/host.html.tmpl is the template of Host tab, the new tab
that shows host information. This file was not listed in
ui/pages/tabs/Makefile.am file resulting on make install, make dist and make rpm
do not install or package this file. You get a "blank" screen when clicking on
host tab.

Also, adjusted the listing according to alphabetic order.

Signed-off-by: Paulo Vital <pvital@linux.vnet.ibm.com>