fix: nospace and newline word navigation issues (@Leonabcd123)

[Leonabcd123]

Fixes the following bugs:

• stop on error: word had no effect in nospace, Fixes Weird edge cases when combining the "Stop on error" option and the funbox mode "nospace" #8037 (the part about nospace funbox with stop on error: word)
• stop on error: word had no effect in a test with newlines after typing a word incorrectly and pressing enter
• difficulty: expert wouldn't fail in nospace after finishing a word
• difficulty: expert wouldn't fail in a test with newlines after finishing a word and pressing enter
• In a test with newlines, after reaching the word limit you couldn't enter a newline to continue, only a space. Now newlines are accepted as well.

[Leonabcd123]

Closed in favor of #8157