* [sql lab] improvements to the left panel
* better error handling with error notifications
* table is added instantly with a loading image
* Fixing tests
* Fixed tests
* Decimal is a valid numeric type
This will allow automatic creation of sum__ and avg__ metrics
* formatting for line length at 80 chars
* Reformating again, for the mandatory 79 chars maximum.
Somehow the CSS trick we use to display histogram-type visual elements
in table views started showing some odd glitches since
what I believe was a not-so-recent version of webkit.
The bug is around the `linear-gradient` call under `background-image`
prop being used to show non-gradient or "hard" colors, while using
transparency.
I was able to find a workaround that addresses things in chrome by using
a fake [minimal] gradient instead of a flat color.
* db_engine_specs: added engine spec for clickhouse
* models: group by time without join on subquery
if this is enabled, it will remove the subquery when grouping by time,
and group by time will be rewritten as group by timeslot, ...
this particularly fixes clickhouse backend
* docs: added clickhouse
* models: allow using secondary dttm columns as constraints
* superset/forms: configurable default slice since time
* superset/models: respect dialect quoting
* dttm handling, codeclimate tweaks
* react: using prop-types package to fix deprecated React.PropTypes property warning
https://facebook.github.io/react/warnings/dont-call-proptypes.html
* removing babel devDependency because has been deprecated in favor of babel-cli
this fixes a warning during `npm install`:
```
npm WARN deprecated babel@6.23.0:
In 6.x, the babel package has been deprecated in favor of babel-cli.
Check https://opencollective.com/babel to support the Babel maintainers
```
* js: setting ExploreActionButtons.queryEndpoint PropType as required
because it's required in the child component DisplayQueryButton
* js(tests): using object in expandedSlices prop type of SliceCell tests
* js(tests): adding required props to SqlEditor mockedProps
* js(tests): adding required prop editorHeight to TabbedSqlEditors mockedProps
* js: removing unused moments dependency
* Fixing PropTypes warning message
React recently started warning on the upcoming deprecation of
React.PropTypes, the new approach is to use the `prop-types`
npm package instead.
* Fixing the tests
The standalone view doesn't need to fetch the datasources asynchronously
to fill in the dataources dropdown, it also doesn't need to render any
of the controls.
