backups: Clean cache if anything other than limits changes

src/settings.js

@@ -472,7 +472,7 @@ async function setBackupConfig(backupConfig) {
     }
 
     // if any of these changes, we have to clear the cache
-    if ([ 'format', 'provider', 'prefix', 'bucket', 'region', 'endpoint', 'backupFolder', 'mountPoint', 'encryption', 'encryptedFilenames' ].some(p => backupConfig[p] !== oldConfig[p])) {
+    if (!_.isEqual(_.omit(backupConfig, 'limits'), _.omit(oldConfig, 'limits'))) {
         debug('setBackupConfig: clearing backup cache');
         backups.cleanupCacheFilesSync();
     }