Schema option callback="(class::)method" added to xPDOObject::set()
patch inherited resource groups for new resource
Design tweaks to the tree per #11540
Further design tweaks per #11540, including context menu styling per #11551
Changed a German phrase
Changed a German phrase

* origin/pr/11557:
  Changed a German phrase
Fix: Preserve order of selected values in multiselect TV
Changed a few english translations
Proposed UI fix for #755
Design tweaks

* origin/pr/11556:
  Further design tweaks per #11540, including context menu styling per #11551
  Design tweaks to the tree per #11540
Preserve order of selected values in multiselect

* origin/pr/11568:
  Proposed UI fix for #755
  Fix: Preserve order of selected values in multiselect TV
Remove core/docs/tutorials

Closes #11573
various design improvements per #11540
give all contexts the same style in the tree
increase padding around the resources list in the tree
Various design improvements

Addresses issues described in #11540

Merge remote-tracking branch 'origin/pr/11574' into develop

* origin/pr/11574:
  increase padding around the resources list in the tree
  give all contexts the same style in the tree
  various design improvements per #11540
Merge remote-tracking branch 'origin/pr/11301' into pr/11301
Add changelog entry for #11301
Fix parent ResourceGroup inheritance on create

Closes #11301

Merge branch 'pr/11301' into develop

* pr/11301:
  Add changelog entry for #11301
  patch inherited resource groups for new resource
Remove deprecated xPDO::getMicroTime() method

Use microtime(true), available since PHP 5.0.0