[REFACTOR] Rename `moduleCodes` to `moduleCodesWithLesson`
[REFACTOR] Rename `moduleCodes` to `moduleCodesWithLesson`

Because we are not yet handling any modules without lessons.

Signed-off-by: Pang Yan Han <22594c345857f664c61cd411f607c4d40a9d4af9@gmail.com>

yanhan/cljs-nusmods,yanhan/cljs-nusmods,yanhan/cljs-nusmods