User can delegate again during a transitionary period (~6s) after they have delegated All tracks.

[hamidra]

problem:
When a delegate All call is submitted, while the tx is in a block but not finalized the app allows the user to click on "Delegate All" or "Select" button to select and delegate again.
expected:
When a user has delegated All tracks they should not be able to delegate any more tracks.

repro steps:

1- Delegate All to a delegate,
2- When tx signed, app action buttons are disabled, tx notification snackbars shown and etc
3- When tx in blocks, action buttons are enabled
4- click on a Delegate All button to deelgate to another delegate (this is not expected)
5- delegate modal opens and you can send another delegate all (the tx will finally fail on chain since chain would not let multiple delegates per track.)

it takes 6-8 seconds for tx to finalize and the app is returned to correct state.