* [i18n, nl] Various improvements to Dutch translation
The text for the "Show categories unfolded by default" was incorrect, cf. #2309. Also fixed a few typos and some minor stylistic changes.
* also fix that typo with the missing space
* Use cookie_duration correctly
* WIP allow cookie_duration to be modified from GUI
* Allow cookie_duration to actually be updated
* Update view to properly display cookie_duration
* Add new strings in Translation Files
* Fix typo
* Fix trailing whitespace
* I18n: French translation
* I18n fr: Forgot todo
* i18n Admin standardization
cz - moved items incorrectly placed in system array to extensions array
nl - remove registration array in user array that doesn't appear in any other translations - possibly from an old version that didn't get removed?
oc - reordered list to standardize order with other translation files.
* Alphabetize extensions Array
* Standardize conf.php
he - removed options not appearing in other i18n files, added missing strings
* Standardize feedback.php
he - removed line not found in other translation files
nl - removed line not found in other translation files
* Standardize gen.php
* Standardize index.php
Major sorting of oc.
Added tags to several languages
* Standardize install.php
ru - added missing strings
it - remove extra string not found in other config files
he - add missing strings, remove strings not found in other languages
oc - reorganize
* Standardize sub.php
* Standardize and fix TODOs
use format "//TODO - Translation" for easier searching
* Fix whitespace
* first draft
* display installed extension state
* fixed whitespace vs tabs
* added translation in all languages
* added error checks and log messages
* fixed tabs vs whitespace
* another try in fixing whitespaces
* another try in fixing whitespaces
* improved extension list translations
* using JSON from official extension repo
* improved version compare
* updated translations
* French translation
Frans de Jonge
Patrick Crandol
Alexandre Alapetite
Alexis Degrugillier
Kevin Papst
Wanabo
Marien Fressinaud