Fix 817 (#851)

* problems: update panel schema

* update packages (build with node 12)

* problems: use datasource from target

* problems: fix query editor after schema update

* problems: fix list layout

* update circleci node image to 12

* fix tests

tslint.json

@@ -64,7 +64,6 @@
     ],
     "variable-name": [
       true,
-      "check-format",
       "ban-keywords",
       "allow-leading-underscore",
       "allow-trailing-underscore",