[Feature request] Add error message for anchor outputs

[Darth-Coin]

Is your feature request related to a problem?
Yes, after new LND implementation of Anchor outputs and discussed here when you try to open a channel with all funds from an UTXO is giving an error that doesn't say too much to a simple user - "reserved wallet balance invalidated". Is really confusing.

Describe the solution you'd like
A simple notice / error message explaining that user need to have a "reserve amount" for anchor output, can be enough. If there's a way to calculate that necessary reserve and display it will be really helpful for noobs.

Right now is only displaying a message of "reserved wallet balance invalidated", with no reason or explanation.

Alternative BEST solution:
Add a simple button "use all available balance to open a channel" that will deduct all the fees and anchor reserves.
Also a way to not display these sats from these UTXOs in the "available" balance of the node, or like a dedicated section, marked UTXOs as "anchor reserved".

If this information is not available to users, many noobs will freak out that their node is not working and even more stupid things.