fix: show the appropriate text when the menu is empty

[RoguedBear]

unable to resolve this till now, but in MessCodeScreen.vue, there are 3 conditions:

• show the menu items
• show the "nothing in menu" if menu is empty
• otherwise show the "loading..." text

coolpool/src/components/MessCodeScreen.vue

Lines 4 to 12 in 090239d

	<div v-if="!menuEmpty && this.menu !== null">
	<div v-for="menuEntry in sortedMenuByTime" :key="menuEntry">
	<MenuItem :jsonMenu="JSON.parse(menuEntry.body)" />
	</div>
	</div>
	<div v-else-if="menuEmpty && menu !== null">
	Menu doesn't seem to contain anything right now :/
	</div>
	<div v-else><h2>Loading...</h2></div>

around midnight, when the menu is empty, ideally "nothing in menu" should be shown but instead no text is shown. ie condition 1 runs and renders a blank.

attempts to fix this boolean logic have been futile and resulting in broken functionality by getting stuck in condition 2 or 3 or exceptions on "undefined" menu making the component error out