Merge pull request #2527 from MilosKozak/release2.6.1

Release of 2.6.1

Merge pull request #2463 from MilosKozak/dev

Release 2.6.0

New Crowdin translations (#2423)

* New translations strings.xml (Korean)

* New translations objectives.xml (Korean)

* New translations objectives.xml (Korean)

* New translations strings.xml (Slovenian)

* New translations insight_alert_codes.xml (Slovenian)

* New translations insight_alert_descriptions.xml (Slovenian)

* New translations insight_alert_titles.xml (Slovenian)

* New translations insight_exceptions.xml (Slovenian)

* New translations exam.xml (Slovenian)

* New translations objectives.xml (Slovenian)

* New translations strings.xml (Slovenian)

* New translations strings.xml (French)

* New translations strings.xml (Korean)

* New translations exam.xml (Korean)

* New translations strings.xml (Portuguese, Brazilian)

* New translations strings.xml (Russian)

* New translations strings.xml (Korean)

* New translations strings.xml (Korean)

* New translations strings.xml (German)

* New translations strings.xml (Italian)

2.6-rc6

2.6-rc5

2.6-rc4

2.6-rc3

2.6-rc2

Merge pull request #2169 from MilosKozak/prep2.5.1

2.5.1