Add a help prompt button to pending transactions.

[Danie0918]

Some transactions may remain pending without being rejected.

Users can try the following actions:

1. Clear cache – remove the transaction record

2. Amend transaction – resubmit the transaction (only available in full node mode)

In Light Client Mode, users may not be aware of these solutions in time. It is recommended to provide a help prompt.

[Danie0918]

PRD: https://zdcvu1.axshare.com/#g=1&p=add_a_help_prompt_button_to_pending_transactions

Add a help prompt button to pending transactions

1. Display a hint button if the transaction status remains pending and unchanged for more than 15 minutes.
   A tooltip with further details appears when the user hovers over the button.
2. Added a "Refresh" button to clear the cache.

[Keith-CY]

The tooltip now is

Some transactions may remain pending without being rejected. You can choose one of the following two options to resolve the current transaction:

1. Go to Settings → Data → Clear Cache to remove the transaction record.

2. Expand the current transaction and click the "Amend" button to replace it. (only available in full node mode)

The first sentence is remain pending without being rejected, I remember that rejected transactions can be marked directly because it's status can be updated by get_transaction.

If now rejected transactions are not marked and wiped out periodically, we can add this function.

For the solutions below, in fact I want these 2 buttons(refresh cache, amend) to be displayed directly. But if it's hard to do, at least we can add a link to Settings => Data => Cache for convenience.