elasticsearch: do not set a placeholder to index name, if it's already specified

[skip ci]

[skip ci]

[skip ci]

Fix switching from es raw document metric breaks query editor

React panels query editor fixes

Explore: Fix table pagination styles

Explore: Dont set datasource in state if navigated away

Panel focus in react

Moved query manipulations from metrics controller to metrics tab so they are more easily shared between angular and react panels

minor changes to react panels

Panel size refactor

fixed singlestat guage ceneterd dot rendering issue

12759 timeshift and panelTimeOverrides

Upgrades the go-macaroon package

- get rid of drop shadow
- get rid of top border
- add min height for better no-data placement
- add margins

Restore user profile preferences