add axios retries to background sync functions

src/lib/sync/areas.js

@@ -1,7 +1,10 @@
 import localforage from 'localforage';
 import axios from 'axios';
+import axiosRetry from 'axios-retry';
 import { areas, areaError } from '$lib/store';
 
+axiosRetry(axios, { retries: 3 });
+
 export const areasSync = async () => {
 	// get areas from local
 	await localforage

src/lib/sync/elements.js

@@ -1,8 +1,11 @@
 import localforage from 'localforage';
 import axios from 'axios';
+import axiosRetry from 'axios-retry';
 import { elements, mapUpdates, elementError, mapLoading, elementsSyncCount } from '$lib/store';
 import { get } from 'svelte/store';
 
+axiosRetry(axios, { retries: 3 });
+
 export const elementsSync = async () => {
 	mapLoading.set('Checking local cache...');
 	// get elements from local

src/lib/sync/events.js

@@ -1,7 +1,10 @@
 import localforage from 'localforage';
 import axios from 'axios';
+import axiosRetry from 'axios-retry';
 import { events, eventError } from '$lib/store';
 
+axiosRetry(axios, { retries: 3 });
+
 export const eventsSync = async () => {
 	// get events from local
 	await localforage

src/lib/sync/reports.js

@@ -1,7 +1,10 @@
 import localforage from 'localforage';
 import axios from 'axios';
+import axiosRetry from 'axios-retry';
 import { reports, reportError } from '$lib/store';
 
+axiosRetry(axios, { retries: 3 });
+
 export const reportsSync = async () => {
 	// get reports from local
 	await localforage

src/lib/sync/users.js

@@ -1,7 +1,10 @@
 import localforage from 'localforage';
 import axios from 'axios';
+import axiosRetry from 'axios-retry';
 import { users, userError } from '$lib/store';
 
+axiosRetry(axios, { retries: 3 });
+
 export const usersSync = async () => {
 	// clear potentially broken users v1 sync due to top level ID changing from string to int
 	await localforage