Add missing title attributes

Summary:
Extended the linter to check for the title attribute, too, and fixed
all violations. Linter will follow in next diff.

Reviewed By: jknoxville

Differential Revision: D14366410

fbshipit-source-id: b4de3592f2537e2bb16d4c2af231e5bee45346e4

src/plugins/leak_canary/package.json

@@ -7,6 +7,7 @@
     "lodash": "^4.17.5"
   },
   "icon": "bird",
+  "title": "LeakCanary",
   "bugs": {
     "email": "jhli@fb.com"
   }

src/plugins/network/package.json

@@ -9,6 +9,7 @@
     "lodash": "^4.17.11"
   },
   "icon": "internet",
+  "title": "Network",
   "bugs": {
     "email": "oncall+flipper@xmail.facebook.com",
     "url": "https://fb.workplace.com/groups/230455004101832/"

src/plugins/sandbox/package.json

@@ -1,5 +1,6 @@
 {
   "name": "Sandbox",
+  "title": "Sandbox",
   "version": "1.0.0",
   "main": "index.js",
   "license": "MIT",