Hack to prevent multiple instantiation of RolesPanel

This commit introduces hacky bugfix and 2 FIXME's:

- Currently settings are fetched inside RolesPanel, but
they should be fetched outside and passed as props
- Manipulations with RolePanel container are introduced
to prevent multiple rerendering and loading of settings,
they won't be needed when all views there will become
React components

Change-Id: Ifb1b8d73233ed960cd0120f2c17fcc2da1f3e972
Closes-Bug: #1395053
Merge "Hack to prevent multiple instantiation of RolesPanel"