UX: close 'welcome'-message when a point is selected via URL (and revive it when closed)

src/Models/MenuState.ts

@@ -90,6 +90,18 @@ export class MenuState {
         if (!visitedBefore.data && shouldShowWelcomeMessage) {
             this.pageStates.about_theme.set(true)
             visitedBefore.set(true)
+            this._selectedElement.addCallbackD(() => {
+                if(this.pageStates.about_theme.data){
+                    this.pageStates.about_theme.set(false)
+                    this._selectedElement.addCallbackAndRun(selected => {
+                        if(!selected){
+                            this.pageStates.about_theme.set(true)
+                            return true
+                        }
+                    })
+                    return true
+                }
+            })
         }
     }