As a user I would like to have a more clear and intuitive icon for 'Set active project' action

[vrubezhny]

Currently we use icon for Set active project action, which, IMHO, doesn't associates clearly enough to switching projects/namespaces currently presented using the following image

It would be good to create/find an image combining the current project/namespace icon with a change/switch/set meaning.

See: #3812 for details

Also it would be good to have a different icons representing projects (for Openshift clusters) and namespaces (for non-Openshift clusters) (as well as according images to be used for the setting current project/namespace actions.