Add restore functionality to feed and render

applications/gui2/src/main.cpp

applications/vision/src/main.cpp

components/common/cpp/include/ftl/configurable.hpp

components/common/cpp/include/ftl/configuration.hpp

components/common/cpp/src/configurable.cpp

components/common/cpp/src/configuration.cpp

components/streams/src/feed.cpp

components/streams/src/renderer.cpp