* get meta data from dataframe meta
* gmdMeta is not used anymore
* wip: move deep link creation to backend
* Refactor backend. Remove not used front end code
* Unit test deep links. Remove not used frontend tests
* remove reference to gmdmeta
* fix goimports error
* fixed after pr feedback
* more changes according to pr feedback
* fix lint issue
* fix bad math expression check and fix bad test
* Decrease nesting
* put link on first data field only
* Datasource/CloudWatch: More robust handling of different query modes
A small refactor which changes how the CloudWatch datasource handles
multiple queries with different query modes. Groundwork for future
Logs/Metrics unification work.
