Qt metrics v1.4: Sorting added to Autotest dashboard list

Sorting the list of Autotests by failure category column added to
Autotest dashboard level 1. The sorted column is identified to the
user. The color codes used in Autotest result history (v1.3) applied
to level 1 list column titles. Description (help) files updated accordingly.
(This change replaces the first one that was abandoned due to merge
problems in depending version v1.3)

Change-Id: I8a1157d2aadf0647b0186e99a44ef07f2291c2a6
Reviewed-by: Tony Sarajärvi <tony.sarajarvi@digia.com>