Improve abandoning and sending of tips

Instead of abandoning 1 claim at a time, we can call:
- lbrynet txo spend --type=support --blocking
- record this value as the tip amount to send

wait for a block

Bonus (if videos over 300):
then call lbrynet txo spend --type=other
to consolidate all inputs
wait a block
then send tip

If the above is not done for large channels, the coinchooser may try to use the super small inputs and fail to tip.

Start with the tip-sending flow and the lbrynet txo spend commands named in the issue. Trace how support and other inputs are abandoned and how the tip amount is determined. Done means large channels can consolidate inputs as described and send the tip without the coinchooser selecting unusably small inputs.

Written by the indexing model from the issue text.