Revert "More changes from phpbb side"

This reverts commit 312ea170d396124b4d7f3ddb5c7fd5887b8cbb87.
Revert "More changes"

This reverts commit c89635d415013b0ef61b982f06c6e05af7a2ba1f.
Revert "Bringing it back to stable"

This reverts commit d45087eb722c748ef55a8ff1bb8827308764178d.
Revert "More settings moved"

This reverts commit a8d28e8306a58ff78b903d1b13118dd0046a688c.
Revert "More moving stuff into the ACP"

This reverts commit f2758a0d613bdd2deba8c11ce12de9ef1191f587.