[#9129] Add refreshURIs call as part of clearing the site cache
Added OnElementNotFound system event
- Show events on new plugin page
- reverted last commit, as already fixed
Login error handling message for invalid username

Username error message shows which user accounts are configured.
Attacker can guess the username. Message should be more generic so that
an attacker cannot guess a configured user account.
Added missing lines for russian language in lexicon's files
Added missing lines for russian language in lexicon's files

* origin/pr/11151:
  Added missing lines for russian language in lexicon's files
Login error handling message for invalid username

non-english lexicons
#11149 Make sure hitting the close button does not trigger double prevent navigation warnings
Login page copyright date

Updated all languages to 2014
Update parent field in Resource panel after drag and drop current resource

Update the parent fields if you currently editing a resource and drag and drop that resource.
(cherry picked from commit 0ffa4ef268eb00c814cb9775b24f70c2ede0edf3)
Add refreshURIs call as part of clearing the site cache

* origin/pr/442:
  [#9129] Add refreshURIs call as part of clearing the site cache
Make sure hitting the close button does not trigger double prevent navigation warnings

* origin/pr/11162:
  #11149 Make sure hitting the close button does not trigger double prevent navigation warnings
Added OnElementNotFound system event

* origin/pr/703:
  - reverted last commit, as already fixed
  - Show events on new plugin page
  Added OnElementNotFound system event
Updated copyright date in login.inc.php

* origin/pr/11166:
  Login page copyright date
Login error handling message for invalid username

* origin/pr/11165:
  Login error handling message for invalid username
  Login error handling message for invalid username

Conflicts:
	core/lexicon/es/login.inc.php
	core/lexicon/et/login.inc.php
	core/lexicon/fr/login.inc.php
	core/lexicon/it/login.inc.php
	core/lexicon/nl/login.inc.php
	core/lexicon/pt-br/login.inc.php
	core/lexicon/sv/login.inc.php
	core/lexicon/th/login.inc.php
Fixed an error while event throws false or non array
Updated check if the event output is an array
Fixed an error while element not found event returns false or non array

* origin/pr/11178:
  Updated check if the event output is an array
  Fixed an error while event throws false or non array