Improve dashboard columns

I have not notice yet, that there is a bigger gap at the right side of
the second dashboard column. This was not so evident on the importer
view due to missing dashboard above. I have improved the styles by
providing a dashboard-left and dashboard-right rule.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Improve layout of the metric report analysis tab

This commits finishes hopefully more or less the restructuring of the
analysis tab. Each line, respectively element sits now in its own row.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Refactor controller and helper for record menu

The direct metadata record selection from the dropdown menu works now
again. For that I mainly had to adjust the code to the new model code.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Change analysis structure for metadata records

I have changed the format in which the analysis items for each metadata
record are persisted. Instead of a hash with the field accessors as key
the analysis key maps to an array. The array then again has hash items
with the key field (= accessor) and score.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>
Display analysis scores normalized

The analysis scores are now displayed in a normalized way, too. While it
makes sense to make a complementary presentation to show the absolute
score, too, I think it is the best choice for the generic metric report
view for now.

Signed-off-by: Konrad Reiche <konrad.reiche@gmail.com>