Enhancing payment channel management notifications

[Jaguaras]

Is your feature related to a problem?

When initiating payment channel closure it is not clear that user needs to do additional step to finalise payment channel closure if there was not enabled strategy to automatically close it.

Current example when payment channel closure was initiated: Channel to 0x016f6cf198ebc291ec2aa598cfc271209a999da8 is pending to close.

Describe the feature you'd like

Adding more details to the notification itself:

Add text: Wait for the 5-minute grace period to end, then finalize the payment channel closure by repeating the closing channel action. If auto finalizing payment channel strategy is enabled, it will finalize automatically.

Example could look like this:

Channel to 0x016f6cf198ebc291ec2aa598cfc271209a999da8 is pending to close.

Wait for the 5-minute grace period to end, then finalize the payment channel closure by repeating the closing channel action. If auto finalizing payment channel strategy is enabled, it will finalize automatically.