Force online check at boot; more dark mode fixes

src/app/service/api.service.ts

@@ -57,7 +57,7 @@ export class ApiService {
   }
 
   protected startOfflineObserver() {
-    const passiveCheckTime = 5;
+    const passiveCheckTime = 120;
     const checkTimes = [5, 5, 10, 10, 15, 15, 20, 20, 30, 30, 30, 60, 60, 500];
     let currentCheckTimeIndex = 0;
     let hasNetConnection = true;
@@ -142,6 +142,11 @@ export class ApiService {
     });
 
     startPassiveCheck();
+
+    this.checkOnline().then(server => {
+      hasServerConnection = server;
+      handleNetConnectionEvent();
+    });
   }
 
   public checkOnline(): Promise<boolean> {