spec: remove requirement
Fix debug output crashing commands (thx @guyhd)

fixes #4226
Fix tooltips in grids being truncated by the browser window

fixes #4650
Fix Json Filter in URLs

Now the filter isn'T encoded in the cr_base part of the cronk string, but appended
as a get parameter. This avoids issues with url parsing

fixes #4425
Tabslider is now stateful

fixes #4626
Remove row expander target if no sub actions defined

fixes #4401
Fix CronkBuilder adding "CUSTOM-"-prefix everytime a cronk is saved

fixes #3917
Fix disabled commands preventing read access to the Icinga Api

fixes #4339
Fix symmetrical bracket creation not guaranteed in Icinga_DoctrineQuery

refs #4733
Fix with calculation for inline event frame

fixes #4369
Fix service principals being applied on host-only api checks

fixes #4154
gridFilterLink: Implement a findByTitle strategy

fixes #4560
Fix iterator being reseted and causing an implicit endless loop in charts

fixes #4014
Fix state persistence of CronkListingPanel

fixes #4660
Changed service combo sort to host_name

fixes #4418
Hostgroups: Fix grouping and pagination

Hostgroups were grouped by state first which let the alias appear multiple times in the grid.
Doctrine automatically creates limit subqueries when left joining "hasMany" relations which
was the case with hostgroups' members.
Merge branch 'support/next-to-1.9' into support/1.9