new method and unit test for it
save external url
extracted link&photo logic and unit tested new method
add http if it does not exist
removed previous error message and added new one
changed placeholder message
changed placeholder message
merged origin/dev manually and resolved conflicts in WikiaMapsPoiControllerTest.php
CR changes: refactored appendLinkAndPhotoIfValid() and split it into two methods
extracted part which was adding http:// to a link and added unit tests for it
updated translations according to messages provided in MWEB-940
Merge pull request #4991 from Wikia/MWEB-940

MWEB-940 Add possibility to save external links for POIs on maps