Color the text "GB needed for full chain" orange for nodes that barely have enough space.
Partial backport of Core PR16714 - part 5 of 5
Commit [[https://github.com/bitcoin/bitcoin/pull/16714/commits/9924bce317b96ab0c57efb99330abd11b6f16b9a | 9924bce317b96ab0c57efb99330abd11b6f16b9a]]
Depends on D7955