Unable to leave "Funding Ask" as blank or TBD

[elliotBraem]

When trying to draft a proposal, I don't know what the funding ask should be yet.

The value defaults as "TBD", but this throws an error when signing the transaction (must be an integer). Then I have to cancel the transaction, leading to #918. Then have to refresh, leading to #919

If I remove "TBD", it seems "T" remains in the transaction (maybe because of debounce? Or some normalization to always keep one value?), causing the error again.

If I input "0", this doesn't seem to be accepted as a "nearest whole positive integer"? So I must enter $1.

Expected

When drafting a proposal, I would like to leave this field as blank or TBD. An empty value should be allowed, and if "TBD" (which is defaulted) remains, maybe this specifically resolves to an empty value as well. A blank value on the proposal view page could show "TBD"