Bugfix: Check existence of all subproject(s) before launching

All defined subproject must exist in order to start lauching sub
build(s). Before only the existence of one project were required
to start the sub build(s) without notifying or logging the
missing project(s).

Change-Id: I1a64097882288806c9d14db437461795263ffff5
List configured and triggered subproject from project view

The subproject section is extended when viewing a project.
Recent builds are examined to resolve dynamically defined
subprojects. As a result, configured projects are grouped
into static, dynamic and unresolved. A fourth group
contains 'other recently executed' subprojects which could
be the case if the project has been reconfigured.

Change-Id: Icb84ed77d8c74e1c607bcd21988d05508bec8550