Fixes tab order of block heading and buttons
Adapts action menu position
Removes superfluous headings
Revert "Removes superfluous headings"

This reverts commit 696b4c5596e71106fcaa7eed229715d922761fd7.
Removes superfluous headings
Renders menu after heading
Moves delete button into textilizable action block
Improves code layout
Fixes button order
update of version and changelog
Update require new stable OpenProject core 3.0.4
Merge branch 'release/3-0-2' into release/3.0
Merge branch 'release/3.0' into stable
fixes path used in spec (changed in core)
replaces stub! with stub
Merge branch 'stable' into dev
Fixes tab order of block heading and buttons
Adapts action menu position
Removes superfluous headings
Revert "Removes superfluous headings"

This reverts commit 696b4c5596e71106fcaa7eed229715d922761fd7.