clean lv plan reactions to ismobile changes

public/js/components/Cis/LvPlan/Lehrveranstaltung.js

@@ -54,6 +54,17 @@ export default {
 			return this.lv.bezeichnung;
 		}
 	},
+	watch: {
+		async isMobile() {
+			await this.$nextTick();
+			this.handleChangeMode(
+				this.currentMode,
+				luxon.DateTime.fromISO(this.currentDay, {
+					zone: this.timezone,
+				}),
+			);
+		},
+	},
 	methods: {
 		handleChangeDate(day, newMode) {
 			return this.handleChangeMode(newMode, day);