ADD: form slider view helper
FIX: Secure eIDDispatcher to block a direct call to that file
!!! CHG: To check the module access rights in the backend, the ajaxID for an ajaxDispatcher call has to follow the convention <targetModuleSignature>::<individualID>
!!! CHG: Actions that should be allowed to be called via the ajaxDispatcher have to be defined
ADD: wrap slider elements to make them styleable
ADD: Category Repository
Merge branch 'develop' of gitlab.pluspunkthosting.de:pt/pt_extbase into develop

* 'develop' of gitlab.pluspunkthosting.de:pt/pt_extbase:
  ADD: wrap slider elements to make them styleable
  ADD: form slider view helper
  TASK: Raise Version
CHG: use id for slider initialization
FIX: slider input field is now found by id
FIX: build extensionService using the ObjectManager
FIX: Merger
Merge the security patch from pt_extbase v1.5.1 into develop
Merge branch 'develop' of gitlab.pluspunkthosting.de:pt/pt_extbase into develop
TASK: Update version to 1.5.1-dev
CHG: Remove extbase version constraint
TASK: Upload Version 1.5.2 to TER