Decrease F5 workflow time w/ VSCode (#3843)

* Decrease F5 workflow time w/ VSCode

webpack is being called twice. Once with --mode production and then
rewritten with --mode development. Fixing tasks and launch.

Author: WardenGnaw

Extension/.vscode/tasks.json

@@ -64,9 +64,6 @@
                 "run",
                 "compileDev"
             ],
-            "dependsOn": [
-                "TypeScript Compile"
-            ],
             "problemMatcher": "$tsc-watch"
         },
         {

Extension/package.json

@@ -1459,14 +1459,15 @@
   },
   "scripts": {
     "compile": "npm run vscode:prepublish",
-    "compileDev": "webpack --mode development",
+    "compileDev": "npm run prepublishjs && webpack --mode development",
     "generateOptionsSchema": "gulp generateOptionsSchema",
     "postinstall": "node ./node_modules/vscode/bin/install",
+    "prepublishjs": "node ./tools/prepublish.js",
     "pretest": "tsc -p test.tsconfig.json",
     "pr-check": "gulp pr-check",
     "tslint": "gulp tslint",
     "unitTests": "gulp unitTests",
-    "vscode:prepublish": "node ./tools/prepublish.js && webpack --mode production",
+    "vscode:prepublish": "npm run prepublishjs && webpack --mode production",
     "watch": "webpack --watch --mode development"
   },
   "devDependencies": {
@@ -1670,4 +1671,4 @@
       "binaries": []
     }
   ]
-}
+}