Show workflows in thread list menu

This CL adds the logic for displaying the list of workflows in the menu
which is added to thread lists. Before, the list included some fake
names. It also adds a button to manage workflows.

The next step is to create the components/logic which will allow the
user to execute the workflow in the selected threads.

Bug: twpowertools:74
Change-Id: I22d0be8a101f9e167b9408bb6046299f3bd3c787
diff --git a/package.json b/package.json
index 8eaa3db..b033fc6 100644
--- a/package.json
+++ b/package.json
@@ -29,6 +29,7 @@
     "css-loader": "^6.2.0",
     "json5": "^2.2.0",
     "path": "^0.12.7",
+    "raw-loader": "^4.0.2",
     "sass": "^1.38.1",
     "sass-loader": "^12.1.0",
     "style-loader": "^3.2.1",