Merge pull request #668 from kasunchathuranga/navSelect

Proceed only if the database is found
Translated using Weblate (Polish)

Currently translated at 99.2% (2588 of 2609)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
4.0.6 release
Merge branch 'MAINT_4_0_6' into QA_4_0
Fix merge conflict
bug #4080 Overwrite existing file not obeyed
Translated using Weblate (Portuguese)

Currently translated at 51.9% (1354 of 2609)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Translated using Weblate (Danish)

Currently translated at 100.0% (2609 of 2609)
bug #3929 Database-specific privileges are not copied when cloning user
Translated using Weblate (Indonesian)

Currently translated at 80.1% (2091 of 2609)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
bug #3997 Error handling in case MySQL extension is missing

We can not work with Response object before loading DBI as it uses it.
Fix URL redirector in case of fatal erorrs
Fixed display of link to documentation
Allow local links to documentation
Update po files
End sentence with comma
Translated using Weblate (Estonian)

Currently translated at 100.0% (2610 of 2610)