Settings

Implementation of AGIOS-224 adding settings to shoot app to:
- configure keycloak url
- be able to clear keychain
since 'Clear Keychain' is an one-time operation in a sense user moves to Settings,chooses clear keychain and returns to the app.  let's perform clearing and then reset the 'flag' to false to note have this state persist on the settings pane. I think it will be more clear