MOBILE-3068 core: Fix some uncaught promises

src/core/course/course.module.ts

@@ -96,7 +96,9 @@ export class CoreCourseModule {
         eventsProvider.on(CoreEventsProvider.LOGIN, () => {
             // Log the app is open to keep user in online status.
             setTimeout(() => {
-                cronDelegate.forceCronHandlerExecution(logHandler.name);
+                cronDelegate.forceCronHandlerExecution(logHandler.name).catch((e) => {
+                    // Ignore errors here, since probably login is not complete: it happens on token invalid.
+                });
             }, 1000);
         });
     }

src/core/siteplugins/providers/helper.ts

@@ -114,6 +114,8 @@ export class CoreSitePluginsHelperProvider {
                         eventsProvider.trigger(CoreEventsProvider.SITE_PLUGINS_LOADED, {}, data.siteId);
                     });
                 }
+            }).catch((e) => {
+                // Ignore errors here.
             }).finally(() => {
                 this.sitePluginsProvider.setPluginsFetched();
             });

src/providers/sites.ts

@@ -1385,6 +1385,8 @@ export class CoreSitesProvider {
                         this.eventsProvider.trigger(CoreEventsProvider.SITE_UPDATED, info, siteId);
                     });
                 });
+            }).catch((error) => {
+                // Ignore that we cannot fetch site info. Probably the auth token is invalid.
             });
         });
     }