[Job] little improvements to the job-form

(#5623)

* the list of portals is saved by ajax and has a different layout

* the button for the final page is also set in the direct call
[Core] adds ContentConroller. It handles static content in modal boxes. Used when showing terms & conditions in the job module oder pricacy policies in the applications module
[Jobs] Renames various Job Formulars
[General] upgrades to ZF2 2.3.
[Jobs] fixes link to the yawik channel description
[Job] disables change of poartals once a job is posted

* adds a HTML-Template-Mail to the core
* adds some additional Events to the Job-Listener ( portals )
* implements a HTML-Mail when job is finished

(#5625)
[Jobs] list the selected portals on the 3rd page when entering a job position
[Job] clean up the code

(#5623)
[General] Downgrades to zf2.2.8
Merge branch 'zend-downgrade-2.2' into develop
[Jobs] sends an approval mail to the owner of the yawik installation, when a new job is created
[Job] disables some formelements when job get activated

(#5624)

Intention
---------

when a job is activated this is like signing a contract,
all changes are now subject of further negotiations.
For now we just implement a formal start of the contract point.
[Job] disables some formelements when job get activated, adds appovalpage

(#5624) (#5634)

Intention
---------

when a job is activated this is like signing a contract,
all changes are now subject of further negotiations.
For now we just implement a formal start of the contract point.
Merge branch 'feature/job_approval_page' into develop
[Jobs] automatic language commit
Merge branch 'develop' of ssh://radon/cross/YAWIK into develop
[Jobs] Approval page contains list of selected channels
[Jobs] make Job not visible when not active

(#5637, gh-80)
[Jobs] expands filter form for jobs

(refs #5636, gh-79)
Merge branch 'feature/job_improvements' into develop