Checks for some invalid data

Check release and profile are found when creating the JSON report.
Naturally there should not be such reports but real life has shown that
if report grouping is changed not all reports not accessible anymore are
necessarily moved/removed by the admin.

So instead of failing miserably just skip such reports.
After all, don't remove invalidish reports

QA Dashboard exporter stops executing if it does not get any reports
(quite naturally it cannot know if this is because of invalid reports or
because there are no more reports).

So just set N/A to release/target if they cannot be read.
Check for key existence since default is set

Cannot use || because the hash has default value.
Check key exists before looping
Fix app_config initializer
Show tab with data on staging environment
Removed bug related "compatibility" hack

Development version of QA Dashboard now understands bugs as an array of
objects. The other hacks are still needed but shouldn't be for long.
Don't replace HTML when editing test cases

Previously editing test case comments received HTML fragment from
backend and placed that in the table cell. This fragment did not however
have the edit mode set and thus re-editing a comment did not work
properly (input was empty).

Now just return HTTP 200 OK from the backend and remove the form element
in the frontend so the markup formatted comments is not lost.
Get rid of QA Dashboard hacks

Decided to still keep configurable "hack" for summaries because the old
ones suit better to QA Dashboard.
Revert test case comment editing

Adding TC attachments did not work with the previous implementation,
reverted to almost what it was. Now we just set @editing=true in backend
when returning the HTML fragment so it contains the needed stuff.
Fixed a test

Got rid of parameter mapping for QA Reports so needed to change a test
as well.
Merge branch 'master' into dev
Do not humanize the profile name
Migration notice related to QA Dashboard
Fix test when not using humanize
Scan IDs from text fields, added tests for ReportShow