Change format of working percenter column

See merge request !713

Flash messages

See merge request !710

fixes/assignment form tweaks-2

See merge request !715

Fix/department managers can create external GroupOffers

See merge request !711

fix/link volunter and clients name to edit on assignment index

See merge request !714

Resolve "Verify & Show Date on Journal"

Closes #412

See merge request !709

Fix bug in GroupAssignmentPolicy

See merge request !707

Merge branch '409-missing-group-offer-creator-for-dropdown-in-form-and-q-for-invalid-form-render-edit' into 'develop'

Resolve "missing Group offer Creator for dropdown in form and @q for invalid form `render :edit`"

Closes #409

See merge request !705

- if the form did not validate, the render :edit on update crashed because
  of missing @q for search form
- in the drop down list, the form had only department_manager users available as creators
  now the creator is beeing added to the list

changes/sort hours index desc meeting date

See merge request !688

Merge branch '408-groupoffer-show-displays-edit-group-offer-add-volunteer-button-when-logged-in-as-volunteer' into 'develop'

Resolve "GroupOffer#show displays 'edit group offer' & 'add volunteer' button when logged in as volunteer"

Closes #408

See merge request !702

changes/add print button to volunteer show and edit

See merge request !697