Fixed question numbers for fillBlanks exercises, reverted multipleChoice underline prompt, added part label to module title, and changed some styles

src/utils/moduleUtils.ts

@@ -26,6 +26,7 @@ export const countExercises = (exercises: Exercise[]) => {
 	const lengthMap = exercises.map((e) => {
 		if (e.type === "multipleChoice") return e.questions.length;
 		if (e.type === "interactiveSpeaking") return e.prompts.length;
+		if (e.type === "fillBlanks") return e.words.length;
 
 		return 1;
 	});