Fixed missing source and sensor text area IDs

Ensures these text fields have unique IDs which resolves warnings in the web browser console.

Milestone: patch

Author: bkuhlmann

app/templates/extensions/sensors/index.html.erb

@@ -1,2 +1,3 @@
-<%= tag.textarea class: "bit-editor",
+<%= tag.textarea id: :extension_sensors,
+                 class: "bit-editor",
                  data: {mode: :read, language: :json} do %><%= content %><% end %>

app/templates/extensions/sources/index.html.erb

@@ -1,2 +1,3 @@
-<%= tag.textarea class: "bit-editor",
+<%= tag.textarea id: :extension_sources,
+                 class: "bit-editor",
                  data: {mode: :read, language: :json} do %><%= content %><% end %>