[skip ci] add jenkins file

[skip ci] transferred api tests

bugfix: switch template after selecting template does not show new nehuba viewer

fix region selection bugs

chore: added test to prevent regression

[skip ci] update GHA to allow for skip ci

hide preview pane if dataset does not have preview

chores

chore: update dataset previewer dep

fix typo in advanced/url doc

remove ngx-bootstrap dependency

Dev upgrade to angular 9

introduce tests

added tests to prevent regression