[Blazor] Improve Blazor Server reconnect UI #55721
Description
There are some UX enhancements that we should consider making to the default Blazor Server reconnection dialog:
- Display how many seconds are remaining until the next reconnection attempt
- This could either replace the "attempts remaining" status or coexist with it
- Quickly attempt the initial reconnection and use exponential backoff to progressively increase the reconnect interval
- Allow the user to manually initiate a reconnect rather than wait for the reconnect interval to complete
- Automatically refresh the page when the max number of reconnection attempts have been reached
- We may need some kind of "stateful reconnection" mechanism before adding this to avoid preemptively clearing browser-side state
- Improve general styling
Related: #32113