Move 'issues' module from 'shell' to 'devtools_app' and 'worker_app'

The issues module depends on the network module. As we do not want to
add the network module to shell, we lift the issues module "upwards"
into the two application configurations that 1) extend from shell and
2) have network available.

R=sigurds@chromium.org, tvanderlippe@chromium.org

Change-Id: Ic975edf871d1e9cd60a65aa0dc800564aa1b7931
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/2123478
Reviewed-by: Tim van der Lippe <tvanderlippe@chromium.org>
Reviewed-by: Sigurd Schneider <sigurds@chromium.org>
Commit-Queue: Simon Zünd <szuend@chromium.org>

front_end/devtools_app.json

@@ -14,6 +14,7 @@
     { "name": "devices" },
     { "name": "elements" },
     { "name": "emulated_devices" , "type": "remote" },
+    { "name": "issues" },
     { "name": "har_importer" },
     { "name": "help" },
     { "name": "layers" },

front_end/issues/module.json

@@ -19,7 +19,7 @@
         "className": "Issues.IssueRevealer"
       }
     ],
-    "dependencies": ["platform", "ui", "host", "components", "sdk"],
+    "dependencies": ["platform", "ui", "host", "components", "sdk", "network"],
     "scripts": [],
     "modules": [
       "issues.js",

front_end/shell.json

@@ -45,7 +45,6 @@
     { "name": "text_editor" },
     { "name": "workspace_diff" },
     { "name": "protocol_monitor"},
-    { "name": "issues"},
     { "name": "input"}
   ]
 }

front_end/worker_app.json

@@ -8,6 +8,7 @@
     { "name": "elements" },
     { "name": "har_importer" },
     { "name": "help" },
+    { "name": "issues" },
     { "name": "layer_viewer" },
     { "name": "network" },
     { "name": "resources" },