Improve state management

[marcinbodnar]

At this moment app state management that is implemented with Redux is not implemented well.

We are storing most of the data in Redux state but a lot of implementation is using params from URL - for example, multisageId that is passed to many pages by URL.

It seems like we are storing the app state using redux-persist, so all data from the previous session are available, but it's not used.

Additionally, app UI is blocked until data is fetched, which is not ideal. It also doesn't make sense since we are storing the state in redux-persist.