Log opcache invalidation failure to debug log

abstract method itemFN()

fix phpdoc for deprecated functinos

check media id validity

fix variable declaration

rename variables

remove Ui\Diff::buildDiffHead()

refactor Diff with extendedRevisionInfo()

obsolete buildDiffHead()

Suppress error in opcache_invalidate() call

translation update

define Ui\Revisions::getRevisions()

- new item property defined
- modified getObjRevInfo(), buildDiffHead()

translation update

allow instance when id is not identical with $INFO['id']

refactor buildDiffHead()

allow id is not identical with $INFO['id']

minor edits

use properties in showDiffViewSelector()

remove getDiffType()

new method setChangeLog()

change methods name

fix typo

identify current rev in html form

use PageDiff::compareWith() for draft, conflict

define preProcess() method

fix checkbox value for current page