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.
bug #3921 Call to undefined function PMA_isSuperuser() if default server is not set
Translated using Weblate (Korean)

Currently translated at 69.0% (1797 of 2603)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Fix merge conflicts
Merge commit 'c061790'
Translated using Weblate (Portuguese (Brazil))

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

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

Currently translated at 53.6% (1428 of 2665)
Translated using Weblate (Hindi)

Currently translated at 53.7% (1432 of 2665)
Translated using Weblate (Hindi)

Currently translated at 53.7% (1432 of 2665)
bug #3971 Ctrl/shift + click opens links in same window
Translated using Weblate (Hindi)

Currently translated at 57.0% (1483 of 2603)
Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Merge commit '70a3d4a'
Merge commit 'b5089cf'