In addition to closing #11578

[skip ci]

tsdb: improve $__timeFilter macro for postgres

* migrated dropdown-typeahead to ts

* removed console.logs

* added @ngInject

ordered user orgs alphabeticaly 

Support deleting empty playlist

Show Grafana version and build in Help menu

* establishes Help as the single place to look for the Grafana version
* version is passed as menu sub-title to side menu
* added rendering of sub-title, plus styles
* sub-title was used by profile menu (its value is the login string),
but was not shown; now showing this value on condition that login name
is different from user name

#11053, #11252, #10836, #11185, #11168, #11332, #11391, #11073, #9342, #11001, #11183, #11211, #11384, #11095, #10792, #11138, 
#11516
[skip ci]

removes codecov from frontend tests

sql tsdb: fix precision and data type support for time columns

Add another URL param «inactive» which works like «kiosk» but with title

Grafana-CLI: mention the plugins directory is not writable on failure

Fix codespell issues

PostgreSQL should not cast all times to uint64