Update visibleElements layout
Function icon in AC and layout updates
Add function icon to AC/browse
Avoid selector clash
Move app.yml with defaults to config/app.yml

The cascade mechanisms merges the configuration files according
to the following order:
  - /apps/qubit/config/app.yml
  - /config/app.yml

So we are storing some defaults in the latter. The user can decide
which one to edit, ideally the user edits the former as it's the one
ignored by the SCM, in cases where the app is deployed using git.
Some fixes in repo/editTheme
Layout fixes in ISDF/index