Add more Telemetry to Data Explorer (#242)

* Add Telemetry to command bar buttons

* Count and report # of files/notebooks/directories in myNotebook to telemetry

* Add resource tree clicks to Telemetry

* Log to Telemetry: opened notebook cell counts by type, kernelspec name

* Fix unit test

* Move Telemetry processor call in notebook traceNotebookTelemetry action from reducer to epic. Use action to trace other info.

* Fix react duplicate key error

* Log notebook cell context menu actions

* Reformat and cleanup

* Move resource tree tracing code out of render(). Only call once when tree is updated

* Fix build issues

src/Explorer/Notebook/NotebookComponent/reducers.ts

@@ -1,7 +1,5 @@
 import { actions, CoreRecord, reducers as nteractReducers } from "@nteract/core";
 import { Action } from "redux";
-import { Areas } from "../../../Common/Constants";
-import * as TelemetryProcessor from "../../../Shared/Telemetry/TelemetryProcessor";
 import * as cdbActions from "./actions";
 import { CdbRecord } from "./types";
 
@@ -72,17 +70,6 @@ export const cdbReducer = (state: CdbRecord, action: Action) => {
       return state.set("hoveredCellId", typedAction.payload.cellId);
     }
 
-    case cdbActions.TRACE_NOTEBOOK_TELEMETRY: {
-      const typedAction = action as cdbActions.TraceNotebookTelemetryAction;
-      TelemetryProcessor.trace(typedAction.payload.action, typedAction.payload.actionModifier, {
-        ...typedAction.payload.data,
-        databaseAccountName: state.databaseAccountName,
-        defaultExperience: state.defaultExperience,
-        dataExplorerArea: Areas.Notebook
-      });
-      return state;
-    }
-
     case cdbActions.UPDATE_NOTEBOOK_PARENT_DOM_ELTS: {
       const typedAction = action as cdbActions.UpdateNotebookParentDomEltAction;
       var parentEltsMap = state.get("currentNotebookParentElements");