Refactored RUN_QUERY, new UPDATE_QUESTION, new `dispatch.action()` middleware

frontend/src/metabase-lib/lib/Question.js

frontend/src/metabase-lib/lib/metadata/Metadata.js

frontend/src/metabase/lib/redux.js

frontend/src/metabase/query_builder/actions.js

...c/metabase/query_builder/components/NativeQueryEditor.jsx

.../metabase/query_builder/components/QueryVisualization.jsx

.../src/metabase/query_builder/components/QuestionEditor.jsx

.../src/metabase/query_builder/components/QuestionHeader.jsx

...metabase/query_builder/components/SavedMetricSelector.jsx

...metabase/query_builder/components/VisualizationResult.jsx

...c/metabase/query_builder/components/dataref/FieldPane.jsx

...metabase/query_builder/components/dataref/SegmentPane.jsx

...src/metabase/query_builder/containers/QuestionBuilder.jsx

frontend/src/metabase/query_builder/reducers.js

frontend/src/metabase/query_builder/selectors.js

frontend/src/metabase/store.js