ReCaptcha feature
ReCaptcha config from setup script

Added config setting to be available from the ./setup script. Captcha
public and private keys are added in the Features->Security tab, the
captchaLogin is available in the New Server tab where you can enable or
disable reCaptcha for that server.
ReCaptcha https and CSP bug fixes
ReCaptcha error message
Recaptcha bug fixes

Error message for empty captcha "Please enter correct captcha!" and if
the user enters correct captcha but wrong login data it won't be
required to enter it next time.
Translated using Weblate (Dutch)

Currently translated at 100.0% (2603 of 2603)
Translated using Weblate (Slovenian)

Currently translated at 100.0% (2665 of 2665)
bug #3960 NavigationBarIconic config not honored
Translated using Weblate (Dutch)

Currently translated at 100.0% (2603 of 2603)
Translated using Weblate (Indonesian)

Currently translated at 74.2% (1932 of 2603)
Translated using Weblate (Korean)

Currently translated at 67.3% (1752 of 2603)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Merge commit 'ae976ff'
Merge branch 'QA_4_0'
Translated using Weblate (Dutch)

Currently translated at 100.0% (2665 of 2665)
Translated using Weblate (Indonesian)

Currently translated at 70.8% (1886 of 2665)
Translated using Weblate (Korean)

Currently translated at 65.0% (1732 of 2665)
Merge remote-tracking branch 'origin/master'
bug #3965 Default language wrong with zh-TW
Translated using Weblate (Albanian)

Currently translated at 30.5% (793 of 2603)