Settings: Improve animation for "Back up" and "Connect Ledger" #29
Description
In Settings, items "Back Up Secret Words" and "Connect Ledger" do not open within the existing Settings modal window, but rather in separate windows. That is because they exist separately and can be accessed from other places in the app. Refactoring is needed to support all possible ways to open these screens, avoiding both code duplication and redundant UI windows.
Make sure to maintain the best possible performance, follow the code style and be attentive to details.